Finding the Fourth Proportional to 1,641.57, 2,458.05 and 1,310.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.57 : 2,458.05 = 1,310.99 : x
2. Step 2: Convert to fraction form
   1,641.57/2,458.05 = 1,310.99/x
3. Step 3: Cross multiply
   1,641.57x = 2,458.05 × 1,310.99
4. Step 4: Simplify right side
   1,641.57x = 3,222,461.76
5. Step 5: Solve for x
   x = 3,222,461.76/1,641.57
6. Step 6: Final answer
   x = 1,963.04