Finding the Fourth Proportional to 1,305.27, 1,801.31 and 715.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,305.27 : 1,801.31 = 715.82 : x
2. Step 2: Convert to fraction form
   1,305.27/1,801.31 = 715.82/x
3. Step 3: Cross multiply
   1,305.27x = 1,801.31 × 715.82
4. Step 4: Simplify right side
   1,305.27x = 1,289,401.14
5. Step 5: Solve for x
   x = 1,289,401.14/1,305.27
6. Step 6: Final answer
   x = 987.84