Finding the Fourth Proportional to 1,916.57, 2,870.64 and 1,423.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,916.57 : 2,870.64 = 1,423.75 : x
2. Step 2: Convert to fraction form
   1,916.57/2,870.64 = 1,423.75/x
3. Step 3: Cross multiply
   1,916.57x = 2,870.64 × 1,423.75
4. Step 4: Simplify right side
   1,916.57x = 4,087,069.93
5. Step 5: Solve for x
   x = 4,087,069.93/1,916.57
6. Step 6: Final answer
   x = 2,132.49