Finding the Fourth Proportional to 8,139.57, 12,211.41 and 3,760.13

Step by Step Solution

1. Step 1: Write the proportion equation
   8,139.57 : 12,211.41 = 3,760.13 : x
2. Step 2: Convert to fraction form
   8,139.57/12,211.41 = 3,760.13/x
3. Step 3: Cross multiply
   8,139.57x = 12,211.41 × 3,760.13
4. Step 4: Simplify right side
   8,139.57x = 45,916,473.82
5. Step 5: Solve for x
   x = 45,916,473.82/8,139.57
6. Step 6: Final answer
   x = 5,641.14