Finding the Fourth Proportional to 8,139.52, 12,214.32 and 3,757.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,139.52 : 12,214.32 = 3,757.60 : x
2. Step 2: Convert to fraction form
   8,139.52/12,214.32 = 3,757.60/x
3. Step 3: Cross multiply
   8,139.52x = 12,214.32 × 3,757.60
4. Step 4: Simplify right side
   8,139.52x = 45,896,528.83
5. Step 5: Solve for x
   x = 45,896,528.83/8,139.52
6. Step 6: Final answer
   x = 5,638.73