Finding the Fourth Proportional to 64,294.72, 88,736.16 and 39,139.52

Step by Step Solution

1. Step 1: Write the proportion equation
   64,294.72 : 88,736.16 = 39,139.52 : x
2. Step 2: Convert to fraction form
   64,294.72/88,736.16 = 39,139.52/x
3. Step 3: Cross multiply
   64,294.72x = 88,736.16 × 39,139.52
4. Step 4: Simplify right side
   64,294.72x = 3,473,090,709.04
5. Step 5: Solve for x
   x = 3,473,090,709.04/64,294.72
6. Step 6: Final answer
   x = 54,018.29