Finding the Fourth Proportional to 64,440, 88,942.56 and 39,310.56

Step by Step Solution

1. Step 1: Write the proportion equation
   64,440 : 88,942.56 = 39,310.56 : x
2. Step 2: Convert to fraction form
   64,440/88,942.56 = 39,310.56/x
3. Step 3: Cross multiply
   64,440x = 88,942.56 × 39,310.56
4. Step 4: Simplify right side
   64,440x = 3,496,381,841.43
5. Step 5: Solve for x
   x = 3,496,381,841.43/64,440
6. Step 6: Final answer
   x = 54,257.94