Finding the Fourth Proportional to 89,728.05, 123,807.89 and 53,918.66

Step by Step Solution

1. Step 1: Write the proportion equation
   89,728.05 : 123,807.89 = 53,918.66 : x
2. Step 2: Convert to fraction form
   89,728.05/123,807.89 = 53,918.66/x
3. Step 3: Cross multiply
   89,728.05x = 123,807.89 × 53,918.66
4. Step 4: Simplify right side
   89,728.05x = 6,675,555,970.54
5. Step 5: Solve for x
   x = 6,675,555,970.54/89,728.05
6. Step 6: Final answer
   x = 74,397.65