Finding the Fourth Proportional to 1,304.72, 1,800.47 and 715.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,304.72 : 1,800.47 = 715.25 : x
2. Step 2: Convert to fraction form
   1,304.72/1,800.47 = 715.25/x
3. Step 3: Cross multiply
   1,304.72x = 1,800.47 × 715.25
4. Step 4: Simplify right side
   1,304.72x = 1,287,773.59
5. Step 5: Solve for x
   x = 1,287,773.59/1,304.72
6. Step 6: Final answer
   x = 987.02