Finding the Fourth Proportional to 2,057.69, 3,088.35 and 1,645.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.69 : 3,088.35 = 1,645.80 : x
2. Step 2: Convert to fraction form
   2,057.69/3,088.35 = 1,645.80/x
3. Step 3: Cross multiply
   2,057.69x = 3,088.35 × 1,645.80
4. Step 4: Simplify right side
   2,057.69x = 5,082,806.43
5. Step 5: Solve for x
   x = 5,082,806.43/2,057.69
6. Step 6: Final answer
   x = 2,470.16