Finding the Fourth Proportional to 1,641.89, 2,264.92 and 1,043.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.89 : 2,264.92 = 1,043.30 : x
2. Step 2: Convert to fraction form
   1,641.89/2,264.92 = 1,043.30/x
3. Step 3: Cross multiply
   1,641.89x = 2,264.92 × 1,043.30
4. Step 4: Simplify right side
   1,641.89x = 2,362,991.04
5. Step 5: Solve for x
   x = 2,362,991.04/1,641.89
6. Step 6: Final answer
   x = 1,439.19