Finding the Fourth Proportional to 156,665.31, 234,925.05 and 56,821.47

Step by Step Solution

1. Step 1: Write the proportion equation
   156,665.31 : 234,925.05 = 56,821.47 : x
2. Step 2: Convert to fraction form
   156,665.31/234,925.05 = 56,821.47/x
3. Step 3: Cross multiply
   156,665.31x = 234,925.05 × 56,821.47
4. Step 4: Simplify right side
   156,665.31x = 13,348,786,680.82
5. Step 5: Solve for x
   x = 13,348,786,680.82/156,665.31
6. Step 6: Final answer
   x = 85,205.76