Finding the Fourth Proportional to 13,199,632,076.52, 18,215,129,145.06 and 7,259,184,870.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,199,632,076.52 : 18,215,129,145.06 = 7,259,184,870.12 : x
2. Step 2: Convert to fraction form
   13,199,632,076.52/18,215,129,145.06 = 7,259,184,870.12/x
3. Step 3: Cross multiply
   13,199,632,076.52x = 18,215,129,145.06 × 7,259,184,870.12
4. Step 4: Simplify right side
   13,199,632,076.52x = 132,226,989,897,101,410,304
5. Step 5: Solve for x
   x = 132,226,989,897,101,410,304/13,199,632,076.52
6. Step 6: Final answer
   x = 10,017,475,421.33