Finding the Fourth Proportional to 1,650.57, 2,470.05 and 1,390.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,650.57 : 2,470.05 = 1,390.83 : x
2. Step 2: Convert to fraction form
   1,650.57/2,470.05 = 1,390.83/x
3. Step 3: Cross multiply
   1,650.57x = 2,470.05 × 1,390.83
4. Step 4: Simplify right side
   1,650.57x = 3,435,419.64
5. Step 5: Solve for x
   x = 3,435,419.64/1,650.57
6. Step 6: Final answer
   x = 2,081.35