Finding the Fourth Proportional to 1,681.92, 2,321.28 and 1,062.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681.92 : 2,321.28 = 1,062.72 : x
2. Step 2: Convert to fraction form
   1,681.92/2,321.28 = 1,062.72/x
3. Step 3: Cross multiply
   1,681.92x = 2,321.28 × 1,062.72
4. Step 4: Simplify right side
   1,681.92x = 2,466,870.68
5. Step 5: Solve for x
   x = 2,466,870.68/1,681.92
6. Step 6: Final answer
   x = 1,466.70