Finding the Fourth Proportional to 99,714.80, 137,581.51 and 60,942.71

Step by Step Solution

1. Step 1: Write the proportion equation
   99,714.80 : 137,581.51 = 60,942.71 : x
2. Step 2: Convert to fraction form
   99,714.80/137,581.51 = 60,942.71/x
3. Step 3: Cross multiply
   99,714.80x = 137,581.51 × 60,942.71
4. Step 4: Simplify right side
   99,714.80x = 8,384,590,065.29
5. Step 5: Solve for x
   x = 8,384,590,065.29/99,714.80
6. Step 6: Final answer
   x = 84,085.71