Finding the Fourth Proportional to 1,152.04, 1,589.86 and 686.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.04 : 1,589.86 = 686.28 : x
2. Step 2: Convert to fraction form
   1,152.04/1,589.86 = 686.28/x
3. Step 3: Cross multiply
   1,152.04x = 1,589.86 × 686.28
4. Step 4: Simplify right side
   1,152.04x = 1,091,089.12
5. Step 5: Solve for x
   x = 1,091,089.12/1,152.04
6. Step 6: Final answer
   x = 947.09