Finding the Fourth Proportional to 1,304.91, 1,800.86 and 715.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,304.91 : 1,800.86 = 715.50 : x
2. Step 2: Convert to fraction form
   1,304.91/1,800.86 = 715.50/x
3. Step 3: Cross multiply
   1,304.91x = 1,800.86 × 715.50
4. Step 4: Simplify right side
   1,304.91x = 1,288,511.75
5. Step 5: Solve for x
   x = 1,288,511.75/1,304.91
6. Step 6: Final answer
   x = 987.43