Finding the Fourth Proportional to 131,615.42, 181,628.76 and 71,186.15

Step by Step Solution

1. Step 1: Write the proportion equation
   131,615.42 : 181,628.76 = 71,186.15 : x
2. Step 2: Convert to fraction form
   131,615.42/181,628.76 = 71,186.15/x
3. Step 3: Cross multiply
   131,615.42x = 181,628.76 × 71,186.15
4. Step 4: Simplify right side
   131,615.42x = 12,929,452,153.67
5. Step 5: Solve for x
   x = 12,929,452,153.67/131,615.42
6. Step 6: Final answer
   x = 98,236.61