Finding the Fourth Proportional to 1,096.72, 1,646.13 and 686.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.72 : 1,646.13 = 686.68 : x
2. Step 2: Convert to fraction form
   1,096.72/1,646.13 = 686.68/x
3. Step 3: Cross multiply
   1,096.72x = 1,646.13 × 686.68
4. Step 4: Simplify right side
   1,096.72x = 1,130,364.55
5. Step 5: Solve for x
   x = 1,130,364.55/1,096.72
6. Step 6: Final answer
   x = 1,030.68