Finding the Fourth Proportional to 1,002.74, 1,382.52 and 648.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.74 : 1,382.52 = 648.06 : x
2. Step 2: Convert to fraction form
   1,002.74/1,382.52 = 648.06/x
3. Step 3: Cross multiply
   1,002.74x = 1,382.52 × 648.06
4. Step 4: Simplify right side
   1,002.74x = 895,952.67
5. Step 5: Solve for x
   x = 895,952.67/1,002.74
6. Step 6: Final answer
   x = 893.50