Finding the Fourth Proportional to 12,257,982.72, 18,380,822.40 and 7,142,065.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,257,982.72 : 18,380,822.40 = 7,142,065.92 : x
2. Step 2: Convert to fraction form
   12,257,982.72/18,380,822.40 = 7,142,065.92/x
3. Step 3: Cross multiply
   12,257,982.72x = 18,380,822.40 × 7,142,065.92
4. Step 4: Simplify right side
   12,257,982.72x = 131,277,045,244,612.59
5. Step 5: Solve for x
   x = 131,277,045,244,612.59/12,257,982.72
6. Step 6: Final answer
   x = 10,709,514.63