Finding the Fourth Proportional to 10,642.68, 15,966.90 and 3,717.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,642.68 : 15,966.90 = 3,717.72 : x
2. Step 2: Convert to fraction form
   10,642.68/15,966.90 = 3,717.72/x
3. Step 3: Cross multiply
   10,642.68x = 15,966.90 × 3,717.72
4. Step 4: Simplify right side
   10,642.68x = 59,360,463.47
5. Step 5: Solve for x
   x = 59,360,463.47/10,642.68
6. Step 6: Final answer
   x = 5,577.59