Finding the Fourth Proportional to 2,379.52, 3,569.28 and 648.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.52 : 3,569.28 = 648.15 : x
2. Step 2: Convert to fraction form
   2,379.52/3,569.28 = 648.15/x
3. Step 3: Cross multiply
   2,379.52x = 3,569.28 × 648.15
4. Step 4: Simplify right side
   2,379.52x = 2,313,428.83
5. Step 5: Solve for x
   x = 2,313,428.83/2,379.52
6. Step 6: Final answer
   x = 972.23