Finding the Fourth Proportional to 89,328.69, 123,331.28 and 55,373.29

Step by Step Solution

1. Step 1: Write the proportion equation
   89,328.69 : 123,331.28 = 55,373.29 : x
2. Step 2: Convert to fraction form
   89,328.69/123,331.28 = 55,373.29/x
3. Step 3: Cross multiply
   89,328.69x = 123,331.28 × 55,373.29
4. Step 4: Simplify right side
   89,328.69x = 6,829,258,148.32
5. Step 5: Solve for x
   x = 6,829,258,148.32/89,328.69
6. Step 6: Final answer
   x = 76,450.89