Finding the Fourth Proportional to 12,491.55, 18,739.76 and 3,726.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,491.55 : 18,739.76 = 3,726.27 : x
2. Step 2: Convert to fraction form
   12,491.55/18,739.76 = 3,726.27/x
3. Step 3: Cross multiply
   12,491.55x = 18,739.76 × 3,726.27
4. Step 4: Simplify right side
   12,491.55x = 69,829,386.86
5. Step 5: Solve for x
   x = 69,829,386.86/12,491.55
6. Step 6: Final answer
   x = 5,590.13