Finding the Fourth Proportional to 81,714.42, 112,807.89 and 56,520.18

Step by Step Solution

1. Step 1: Write the proportion equation
   81,714.42 : 112,807.89 = 56,520.18 : x
2. Step 2: Convert to fraction form
   81,714.42/112,807.89 = 56,520.18/x
3. Step 3: Cross multiply
   81,714.42x = 112,807.89 × 56,520.18
4. Step 4: Simplify right side
   81,714.42x = 6,375,922,248.22
5. Step 5: Solve for x
   x = 6,375,922,248.22/81,714.42
6. Step 6: Final answer
   x = 78,026.89