Finding the Fourth Proportional to 1,062.38, 1,466.12 and 642.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,062.38 : 1,466.12 = 642.81 : x
2. Step 2: Convert to fraction form
   1,062.38/1,466.12 = 642.81/x
3. Step 3: Cross multiply
   1,062.38x = 1,466.12 × 642.81
4. Step 4: Simplify right side
   1,062.38x = 942,426.05
5. Step 5: Solve for x
   x = 942,426.05/1,062.38
6. Step 6: Final answer
   x = 887.09