Finding the Fourth Proportional to 10,651.68, 15,980.40 and 3,726.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,651.68 : 15,980.40 = 3,726.72 : x
2. Step 2: Convert to fraction form
   10,651.68/15,980.40 = 3,726.72/x
3. Step 3: Cross multiply
   10,651.68x = 15,980.40 × 3,726.72
4. Step 4: Simplify right side
   10,651.68x = 59,554,476.29
5. Step 5: Solve for x
   x = 59,554,476.29/10,651.68
6. Step 6: Final answer
   x = 5,591.09