Finding the Fourth Proportional to 1,304.59, 1,800.35 and 715.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,304.59 : 1,800.35 = 715.18 : x
2. Step 2: Convert to fraction form
   1,304.59/1,800.35 = 715.18/x
3. Step 3: Cross multiply
   1,304.59x = 1,800.35 × 715.18
4. Step 4: Simplify right side
   1,304.59x = 1,287,574.31
5. Step 5: Solve for x
   x = 1,287,574.31/1,304.59
6. Step 6: Final answer
   x = 986.96