Finding the Fourth Proportional to 131,709.20, 181,758.69 and 71,280.27

Step by Step Solution

1. Step 1: Write the proportion equation
   131,709.20 : 181,758.69 = 71,280.27 : x
2. Step 2: Convert to fraction form
   131,709.20/181,758.69 = 71,280.27/x
3. Step 3: Cross multiply
   131,709.20x = 181,758.69 × 71,280.27
4. Step 4: Simplify right side
   131,709.20x = 12,955,808,498.05
5. Step 5: Solve for x
   x = 12,955,808,498.05/131,709.20
6. Step 6: Final answer
   x = 98,366.77