Finding the Fourth Proportional to 13,305,978.03, 18,362,142.72 and 7,724,742.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,305,978.03 : 18,362,142.72 = 7,724,742.42 : x
2. Step 2: Convert to fraction form
   13,305,978.03/18,362,142.72 = 7,724,742.42/x
3. Step 3: Cross multiply
   13,305,978.03x = 18,362,142.72 × 7,724,742.42
4. Step 4: Simplify right side
   13,305,978.03x = 141,842,822,791,278.16
5. Step 5: Solve for x
   x = 141,842,822,791,278.16/13,305,978.03
6. Step 6: Final answer
   x = 10,660,082.44