Finding the Fourth Proportional to 215,947.72, 323,781.18 and 89,553.16

Step by Step Solution

1. Step 1: Write the proportion equation
   215,947.72 : 323,781.18 = 89,553.16 : x
2. Step 2: Convert to fraction form
   215,947.72/323,781.18 = 89,553.16/x
3. Step 3: Cross multiply
   215,947.72x = 323,781.18 × 89,553.16
4. Step 4: Simplify right side
   215,947.72x = 28,995,627,817.53
5. Step 5: Solve for x
   x = 28,995,627,817.53/215,947.72
6. Step 6: Final answer
   x = 134,271.52