Finding the Fourth Proportional to 1,916.87, 2,869.83 and 1,763.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,916.87 : 2,869.83 = 1,763.78 : x
2. Step 2: Convert to fraction form
   1,916.87/2,869.83 = 1,763.78/x
3. Step 3: Cross multiply
   1,916.87x = 2,869.83 × 1,763.78
4. Step 4: Simplify right side
   1,916.87x = 5,061,734.41
5. Step 5: Solve for x
   x = 5,061,734.41/1,916.87
6. Step 6: Final answer
   x = 2,640.63