Finding the Fourth Proportional to 57,038.97, 78,631.42 and 39,105.57

Step by Step Solution

1. Step 1: Write the proportion equation
   57,038.97 : 78,631.42 = 39,105.57 : x
2. Step 2: Convert to fraction form
   57,038.97/78,631.42 = 39,105.57/x
3. Step 3: Cross multiply
   57,038.97x = 78,631.42 × 39,105.57
4. Step 4: Simplify right side
   57,038.97x = 3,074,926,499.01
5. Step 5: Solve for x
   x = 3,074,926,499.01/57,038.97
6. Step 6: Final answer
   x = 53,909.22