Finding the Fourth Proportional to 131,834.94, 181,931.76 and 71,405.40

Step by Step Solution

1. Step 1: Write the proportion equation
   131,834.94 : 181,931.76 = 71,405.40 : x
2. Step 2: Convert to fraction form
   131,834.94/181,931.76 = 71,405.40/x
3. Step 3: Cross multiply
   131,834.94x = 181,931.76 × 71,405.40
4. Step 4: Simplify right side
   131,834.94x = 12,990,910,095.50
5. Step 5: Solve for x
   x = 12,990,910,095.50/131,834.94
6. Step 6: Final answer
   x = 98,539.20