Finding the Fourth Proportional to 1,078.38, 1,487.52 and 705.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.38 : 1,487.52 = 705.24 : x
2. Step 2: Convert to fraction form
   1,078.38/1,487.52 = 705.24/x
3. Step 3: Cross multiply
   1,078.38x = 1,487.52 × 705.24
4. Step 4: Simplify right side
   1,078.38x = 1,049,058.60
5. Step 5: Solve for x
   x = 1,049,058.60/1,078.38
6. Step 6: Final answer
   x = 972.81