Finding the Fourth Proportional to 1,401.12, 2,101.92 and 708.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.12 : 2,101.92 = 708.12 : x
2. Step 2: Convert to fraction form
   1,401.12/2,101.92 = 708.12/x
3. Step 3: Cross multiply
   1,401.12x = 2,101.92 × 708.12
4. Step 4: Simplify right side
   1,401.12x = 1,488,411.59
5. Step 5: Solve for x
   x = 1,488,411.59/1,401.12
6. Step 6: Final answer
   x = 1,062.30