Finding the Fourth Proportional to 156,941.57, 216,581.83 and 85,321.86

Step by Step Solution

1. Step 1: Write the proportion equation
   156,941.57 : 216,581.83 = 85,321.86 : x
2. Step 2: Convert to fraction form
   156,941.57/216,581.83 = 85,321.86/x
3. Step 3: Cross multiply
   156,941.57x = 216,581.83 × 85,321.86
4. Step 4: Simplify right side
   156,941.57x = 18,479,164,475.25
5. Step 5: Solve for x
   x = 18,479,164,475.25/156,941.57
6. Step 6: Final answer
   x = 117,745.51