Finding the Fourth Proportional to 156,770.73, 216,345.24 and 85,152.15

Step by Step Solution

1. Step 1: Write the proportion equation
   156,770.73 : 216,345.24 = 85,152.15 : x
2. Step 2: Convert to fraction form
   156,770.73/216,345.24 = 85,152.15/x
3. Step 3: Cross multiply
   156,770.73x = 216,345.24 × 85,152.15
4. Step 4: Simplify right side
   156,770.73x = 18,422,262,328.27
5. Step 5: Solve for x
   x = 18,422,262,328.27/156,770.73
6. Step 6: Final answer
   x = 117,510.85