Finding the Fourth Proportional to 1,662.24, 2,490.17 and 929.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.24 : 2,490.17 = 929.60 : x
2. Step 2: Convert to fraction form
   1,662.24/2,490.17 = 929.60/x
3. Step 3: Cross multiply
   1,662.24x = 2,490.17 × 929.60
4. Step 4: Simplify right side
   1,662.24x = 2,314,844.93
5. Step 5: Solve for x
   x = 2,314,844.93/1,662.24
6. Step 6: Final answer
   x = 1,392.61