Finding the Fourth Proportional to 131,402.72, 181,122.72 and 102,672.16

Step by Step Solution

1. Step 1: Write the proportion equation
   131,402.72 : 181,122.72 = 102,672.16 : x
2. Step 2: Convert to fraction form
   131,402.72/181,122.72 = 102,672.16/x
3. Step 3: Cross multiply
   131,402.72x = 181,122.72 × 102,672.16
4. Step 4: Simplify right side
   131,402.72x = 18,596,260,887.48
5. Step 5: Solve for x
   x = 18,596,260,887.48/131,402.72
6. Step 6: Final answer
   x = 141,521.13