Finding the Fourth Proportional to 1,304.57, 1,800.30 and 715.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,304.57 : 1,800.30 = 715.10 : x
2. Step 2: Convert to fraction form
   1,304.57/1,800.30 = 715.10/x
3. Step 3: Cross multiply
   1,304.57x = 1,800.30 × 715.10
4. Step 4: Simplify right side
   1,304.57x = 1,287,388.21
5. Step 5: Solve for x
   x = 1,287,388.21/1,304.57
6. Step 6: Final answer
   x = 986.83