Finding the Fourth Proportional to 1,007.27, 1,390.18 and 614.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.27 : 1,390.18 = 614.52 : x
2. Step 2: Convert to fraction form
   1,007.27/1,390.18 = 614.52/x
3. Step 3: Cross multiply
   1,007.27x = 1,390.18 × 614.52
4. Step 4: Simplify right side
   1,007.27x = 854,288.40
5. Step 5: Solve for x
   x = 854,288.40/1,007.27
6. Step 6: Final answer
   x = 848.13