Finding the Fourth Proportional to 89,128.87, 133,603.34 and 55,872.29

Step by Step Solution

1. Step 1: Write the proportion equation
   89,128.87 : 133,603.34 = 55,872.29 : x
2. Step 2: Convert to fraction form
   89,128.87/133,603.34 = 55,872.29/x
3. Step 3: Cross multiply
   89,128.87x = 133,603.34 × 55,872.29
4. Step 4: Simplify right side
   89,128.87x = 7,464,724,557.45
5. Step 5: Solve for x
   x = 7,464,724,557.45/89,128.87
6. Step 6: Final answer
   x = 83,752.04