Finding the Fourth Proportional to 1,769.71, 2,641.61 and 1,641.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,769.71 : 2,641.61 = 1,641.21 : x
2. Step 2: Convert to fraction form
   1,769.71/2,641.61 = 1,641.21/x
3. Step 3: Cross multiply
   1,769.71x = 2,641.61 × 1,641.21
4. Step 4: Simplify right side
   1,769.71x = 4,335,436.75
5. Step 5: Solve for x
   x = 4,335,436.75/1,769.71
6. Step 6: Final answer
   x = 2,449.80