Finding the Fourth Proportional to 1,666.24, 2,496.56 and 1,015.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.24 : 2,496.56 = 1,015.61 : x
2. Step 2: Convert to fraction form
   1,666.24/2,496.56 = 1,015.61/x
3. Step 3: Cross multiply
   1,666.24x = 2,496.56 × 1,015.61
4. Step 4: Simplify right side
   1,666.24x = 2,535,513.74
5. Step 5: Solve for x
   x = 2,535,513.74/1,666.24
6. Step 6: Final answer
   x = 1,521.70