Finding the Fourth Proportional to 1,304.71, 1,800.54 and 715.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,304.71 : 1,800.54 = 715.29 : x
2. Step 2: Convert to fraction form
   1,304.71/1,800.54 = 715.29/x
3. Step 3: Cross multiply
   1,304.71x = 1,800.54 × 715.29
4. Step 4: Simplify right side
   1,304.71x = 1,287,899.25
5. Step 5: Solve for x
   x = 1,287,899.25/1,304.71
6. Step 6: Final answer
   x = 987.12