Finding the Fourth Proportional to 131,364.50, 181,287.34 and 71,748.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,364.50 : 181,287.34 = 71,748.50 : x
2. Step 2: Convert to fraction form
   131,364.50/181,287.34 = 71,748.50/x
3. Step 3: Cross multiply
   131,364.50x = 181,287.34 × 71,748.50
4. Step 4: Simplify right side
   131,364.50x = 13,007,094,713.99
5. Step 5: Solve for x
   x = 13,007,094,713.99/131,364.50
6. Step 6: Final answer
   x = 99,015.29