Finding the Fourth Proportional to 64,607.31, 89,166.06 and 39,114.63

Step by Step Solution

1. Step 1: Write the proportion equation
   64,607.31 : 89,166.06 = 39,114.63 : x
2. Step 2: Convert to fraction form
   64,607.31/89,166.06 = 39,114.63/x
3. Step 3: Cross multiply
   64,607.31x = 89,166.06 × 39,114.63
4. Step 4: Simplify right side
   64,607.31x = 3,487,697,445.46
5. Step 5: Solve for x
   x = 3,487,697,445.46/64,607.31
6. Step 6: Final answer
   x = 53,983.02