Finding the Fourth Proportional to 1,060.16, 1,461.92 and 686.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.16 : 1,461.92 = 686.72 : x
2. Step 2: Convert to fraction form
   1,060.16/1,461.92 = 686.72/x
3. Step 3: Cross multiply
   1,060.16x = 1,461.92 × 686.72
4. Step 4: Simplify right side
   1,060.16x = 1,003,929.70
5. Step 5: Solve for x
   x = 1,003,929.70/1,060.16
6. Step 6: Final answer
   x = 946.96