Finding the Fourth Proportional to 10,562.70, 15,842.88 and 2,665.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,562.70 : 15,842.88 = 2,665.20 : x
2. Step 2: Convert to fraction form
   10,562.70/15,842.88 = 2,665.20/x
3. Step 3: Cross multiply
   10,562.70x = 15,842.88 × 2,665.20
4. Step 4: Simplify right side
   10,562.70x = 42,224,443.78
5. Step 5: Solve for x
   x = 42,224,443.78/10,562.70
6. Step 6: Final answer
   x = 3,997.50