Finding the Fourth Proportional to 1,304.93, 1,800.79 and 715.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,304.93 : 1,800.79 = 715.47 : x
2. Step 2: Convert to fraction form
   1,304.93/1,800.79 = 715.47/x
3. Step 3: Cross multiply
   1,304.93x = 1,800.79 × 715.47
4. Step 4: Simplify right side
   1,304.93x = 1,288,411.22
5. Step 5: Solve for x
   x = 1,288,411.22/1,304.93
6. Step 6: Final answer
   x = 987.34