Finding the Fourth Proportional to 131,655, 181,688.46 and 72,039

Step by Step Solution

1. Step 1: Write the proportion equation
   131,655 : 181,688.46 = 72,039 : x
2. Step 2: Convert to fraction form
   131,655/181,688.46 = 72,039/x
3. Step 3: Cross multiply
   131,655x = 181,688.46 × 72,039
4. Step 4: Simplify right side
   131,655x = 13,088,654,969.94
5. Step 5: Solve for x
   x = 13,088,654,969.94/131,655
6. Step 6: Final answer
   x = 99,416.32