Finding the Fourth Proportional to 1,665.24, 2,499.90 and 935.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.24 : 2,499.90 = 935.40 : x
2. Step 2: Convert to fraction form
   1,665.24/2,499.90 = 935.40/x
3. Step 3: Cross multiply
   1,665.24x = 2,499.90 × 935.40
4. Step 4: Simplify right side
   1,665.24x = 2,338,406.46
5. Step 5: Solve for x
   x = 2,338,406.46/1,665.24
6. Step 6: Final answer
   x = 1,404.25