Finding the Fourth Proportional to 10,449.98, 15,674.90 and 2,658.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,449.98 : 15,674.90 = 2,658.72 : x
2. Step 2: Convert to fraction form
   10,449.98/15,674.90 = 2,658.72/x
3. Step 3: Cross multiply
   10,449.98x = 15,674.90 × 2,658.72
4. Step 4: Simplify right side
   10,449.98x = 41,675,170.13
5. Step 5: Solve for x
   x = 41,675,170.13/10,449.98
6. Step 6: Final answer
   x = 3,988.06