Finding the Fourth Proportional to 64,658.78, 89,208.33 and 39,157.01

Step by Step Solution

1. Step 1: Write the proportion equation
   64,658.78 : 89,208.33 = 39,157.01 : x
2. Step 2: Convert to fraction form
   64,658.78/89,208.33 = 39,157.01/x
3. Step 3: Cross multiply
   64,658.78x = 89,208.33 × 39,157.01
4. Step 4: Simplify right side
   64,658.78x = 3,493,131,469.89
5. Step 5: Solve for x
   x = 3,493,131,469.89/64,658.78
6. Step 6: Final answer
   x = 54,024.09