Finding the Fourth Proportional to 2,070.40, 2,854.36 and 1,406.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.40 : 2,854.36 = 1,406.10 : x
2. Step 2: Convert to fraction form
   2,070.40/2,854.36 = 1,406.10/x
3. Step 3: Cross multiply
   2,070.40x = 2,854.36 × 1,406.10
4. Step 4: Simplify right side
   2,070.40x = 4,013,508.57
5. Step 5: Solve for x
   x = 4,013,508.57/2,070.40
6. Step 6: Final answer
   x = 1,938.52