Finding the Fourth Proportional to 7,074.31, 9,762.55 and 3,930.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,074.31 : 9,762.55 = 3,930.50 : x
2. Step 2: Convert to fraction form
   7,074.31/9,762.55 = 3,930.50/x
3. Step 3: Cross multiply
   7,074.31x = 9,762.55 × 3,930.50
4. Step 4: Simplify right side
   7,074.31x = 38,371,702.78
5. Step 5: Solve for x
   x = 38,371,702.78/7,074.31
6. Step 6: Final answer
   x = 5,424.09