Finding the Fourth Proportional to 1,032.72, 1,549.62 and 686.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,032.72 : 1,549.62 = 686.30 : x
2. Step 2: Convert to fraction form
   1,032.72/1,549.62 = 686.30/x
3. Step 3: Cross multiply
   1,032.72x = 1,549.62 × 686.30
4. Step 4: Simplify right side
   1,032.72x = 1,063,493.03
5. Step 5: Solve for x
   x = 1,063,493.03/1,032.72
6. Step 6: Final answer
   x = 1,029.80