Finding the Fourth Proportional to 156,976.55, 216,626.56 and 85,356.62

Step by Step Solution

1. Step 1: Write the proportion equation
   156,976.55 : 216,626.56 = 85,356.62 : x
2. Step 2: Convert to fraction form
   156,976.55/216,626.56 = 85,356.62/x
3. Step 3: Cross multiply
   156,976.55x = 216,626.56 × 85,356.62
4. Step 4: Simplify right side
   156,976.55x = 18,490,510,963.83
5. Step 5: Solve for x
   x = 18,490,510,963.83/156,976.55
6. Step 6: Final answer
   x = 117,791.55