Finding the Fourth Proportional to 89,441.49, 123,402.31 and 53,618.43

Step by Step Solution

1. Step 1: Write the proportion equation
   89,441.49 : 123,402.31 = 53,618.43 : x
2. Step 2: Convert to fraction form
   89,441.49/123,402.31 = 53,618.43/x
3. Step 3: Cross multiply
   89,441.49x = 123,402.31 × 53,618.43
4. Step 4: Simplify right side
   89,441.49x = 6,616,638,120.57
5. Step 5: Solve for x
   x = 6,616,638,120.57/89,441.49
6. Step 6: Final answer
   x = 73,977.28