Finding the Fourth Proportional to 142,691.56, 196,915.80 and 86,092

Step by Step Solution

1. Step 1: Write the proportion equation
   142,691.56 : 196,915.80 = 86,092 : x
2. Step 2: Convert to fraction form
   142,691.56/196,915.80 = 86,092/x
3. Step 3: Cross multiply
   142,691.56x = 196,915.80 × 86,092
4. Step 4: Simplify right side
   142,691.56x = 16,952,875,053.60
5. Step 5: Solve for x
   x = 16,952,875,053.60/142,691.56
6. Step 6: Final answer
   x = 118,807.83