Finding the Fourth Proportional to 140,308.87, 193,689.99 and 89,391.43

Step by Step Solution

1. Step 1: Write the proportion equation
   140,308.87 : 193,689.99 = 89,391.43 : x
2. Step 2: Convert to fraction form
   140,308.87/193,689.99 = 89,391.43/x
3. Step 3: Cross multiply
   140,308.87x = 193,689.99 × 89,391.43
4. Step 4: Simplify right side
   140,308.87x = 17,314,225,182.79
5. Step 5: Solve for x
   x = 17,314,225,182.79/140,308.87
6. Step 6: Final answer
   x = 123,400.79