Finding the Fourth Proportional to 12,648.38, 18,969.86 and 3,761.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.38 : 18,969.86 = 3,761.57 : x
2. Step 2: Convert to fraction form
   12,648.38/18,969.86 = 3,761.57/x
3. Step 3: Cross multiply
   12,648.38x = 18,969.86 × 3,761.57
4. Step 4: Simplify right side
   12,648.38x = 71,356,437.47
5. Step 5: Solve for x
   x = 71,356,437.47/12,648.38
6. Step 6: Final answer
   x = 5,641.55