Finding the Fourth Proportional to 2,113.10, 2,916.46 and 2,019.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.10 : 2,916.46 = 2,019.70 : x
2. Step 2: Convert to fraction form
   2,113.10/2,916.46 = 2,019.70/x
3. Step 3: Cross multiply
   2,113.10x = 2,916.46 × 2,019.70
4. Step 4: Simplify right side
   2,113.10x = 5,890,369.07
5. Step 5: Solve for x
   x = 5,890,369.07/2,113.10
6. Step 6: Final answer
   x = 2,787.54