Finding the Fourth Proportional to 1,079.02, 1,488.81 and 686.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.02 : 1,488.81 = 686.62 : x
2. Step 2: Convert to fraction form
   1,079.02/1,488.81 = 686.62/x
3. Step 3: Cross multiply
   1,079.02x = 1,488.81 × 686.62
4. Step 4: Simplify right side
   1,079.02x = 1,022,246.72
5. Step 5: Solve for x
   x = 1,022,246.72/1,079.02
6. Step 6: Final answer
   x = 947.38