Finding the Fourth Proportional to 102,742.29, 141,714.36 and 89,290.62

Step by Step Solution

1. Step 1: Write the proportion equation
   102,742.29 : 141,714.36 = 89,290.62 : x
2. Step 2: Convert to fraction form
   102,742.29/141,714.36 = 89,290.62/x
3. Step 3: Cross multiply
   102,742.29x = 141,714.36 × 89,290.62
4. Step 4: Simplify right side
   102,742.29x = 12,653,763,067.30
5. Step 5: Solve for x
   x = 12,653,763,067.30/102,742.29
6. Step 6: Final answer
   x = 123,160.22