Finding the Fourth Proportional to 131,818.68, 181,908.72 and 71,388.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,818.68 : 181,908.72 = 71,388.50 : x
2. Step 2: Convert to fraction form
   131,818.68/181,908.72 = 71,388.50/x
3. Step 3: Cross multiply
   131,818.68x = 181,908.72 × 71,388.50
4. Step 4: Simplify right side
   131,818.68x = 12,986,189,748.18
5. Step 5: Solve for x
   x = 12,986,189,748.18/131,818.68
6. Step 6: Final answer
   x = 98,515.55