Finding the Fourth Proportional to 64,557.39, 89,083.76 and 39,402.03

Step by Step Solution

1. Step 1: Write the proportion equation
   64,557.39 : 89,083.76 = 39,402.03 : x
2. Step 2: Convert to fraction form
   64,557.39/89,083.76 = 39,402.03/x
3. Step 3: Cross multiply
   64,557.39x = 89,083.76 × 39,402.03
4. Step 4: Simplify right side
   64,557.39x = 3,510,080,787.02
5. Step 5: Solve for x
   x = 3,510,080,787.02/64,557.39
6. Step 6: Final answer
   x = 54,371.48