Finding the Fourth Proportional to 102,111.72, 140,874.84 and 75,317.73

Step by Step Solution

1. Step 1: Write the proportion equation
   102,111.72 : 140,874.84 = 75,317.73 : x
2. Step 2: Convert to fraction form
   102,111.72/140,874.84 = 75,317.73/x
3. Step 3: Cross multiply
   102,111.72x = 140,874.84 × 75,317.73
4. Step 4: Simplify right side
   102,111.72x = 10,610,373,162.91
5. Step 5: Solve for x
   x = 10,610,373,162.91/102,111.72
6. Step 6: Final answer
   x = 103,909.45