Finding the Fourth Proportional to 2,070.43, 2,856.70 and 1,399.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.43 : 2,856.70 = 1,399.48 : x
2. Step 2: Convert to fraction form
   2,070.43/2,856.70 = 1,399.48/x
3. Step 3: Cross multiply
   2,070.43x = 2,856.70 × 1,399.48
4. Step 4: Simplify right side
   2,070.43x = 3,997,897.32
5. Step 5: Solve for x
   x = 3,997,897.32/2,070.43
6. Step 6: Final answer
   x = 1,930.95