Finding the Fourth Proportional to 1,062.24, 1,466.04 and 642.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,062.24 : 1,466.04 = 642.60 : x
2. Step 2: Convert to fraction form
   1,062.24/1,466.04 = 642.60/x
3. Step 3: Cross multiply
   1,062.24x = 1,466.04 × 642.60
4. Step 4: Simplify right side
   1,062.24x = 942,077.30
5. Step 5: Solve for x
   x = 942,077.30/1,062.24
6. Step 6: Final answer
   x = 886.88