Finding the Fourth Proportional to 131,538,783.02, 181,523,908.96 and 72,805,527.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,538,783.02 : 181,523,908.96 = 72,805,527.50 : x
2. Step 2: Convert to fraction form
   131,538,783.02/181,523,908.96 = 72,805,527.50/x
3. Step 3: Cross multiply
   131,538,783.02x = 181,523,908.96 × 72,805,527.50
4. Step 4: Simplify right side
   131,538,783.02x = 13,215,943,945,694,778
5. Step 5: Solve for x
   x = 13,215,943,945,694,778/131,538,783.02
6. Step 6: Final answer
   x = 100,471,842.92