Finding the Fourth Proportional to 1,100.24, 1,517.92 and 680.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.24 : 1,517.92 = 680.32 : x
2. Step 2: Convert to fraction form
   1,100.24/1,517.92 = 680.32/x
3. Step 3: Cross multiply
   1,100.24x = 1,517.92 × 680.32
4. Step 4: Simplify right side
   1,100.24x = 1,032,671.33
5. Step 5: Solve for x
   x = 1,032,671.33/1,100.24
6. Step 6: Final answer
   x = 938.59