Finding the Fourth Proportional to 1,062.48, 1,465.80 and 648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,062.48 : 1,465.80 = 648.72 : x
2. Step 2: Convert to fraction form
   1,062.48/1,465.80 = 648.72/x
3. Step 3: Cross multiply
   1,062.48x = 1,465.80 × 648.72
4. Step 4: Simplify right side
   1,062.48x = 950,893.78
5. Step 5: Solve for x
   x = 950,893.78/1,062.48
6. Step 6: Final answer
   x = 894.98