Finding the Fourth Proportional to 215,568.03, 323,391.01 and 89,139.61

Step by Step Solution

1. Step 1: Write the proportion equation
   215,568.03 : 323,391.01 = 89,139.61 : x
2. Step 2: Convert to fraction form
   215,568.03/323,391.01 = 89,139.61/x
3. Step 3: Cross multiply
   215,568.03x = 323,391.01 × 89,139.61
4. Step 4: Simplify right side
   215,568.03x = 28,826,949,516.26
5. Step 5: Solve for x
   x = 28,826,949,516.26/215,568.03
6. Step 6: Final answer
   x = 133,725.53