Finding the Fourth Proportional to 2,113.17, 3,154.27 and 1,863.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.17 : 3,154.27 = 1,863.78 : x
2. Step 2: Convert to fraction form
   2,113.17/3,154.27 = 1,863.78/x
3. Step 3: Cross multiply
   2,113.17x = 3,154.27 × 1,863.78
4. Step 4: Simplify right side
   2,113.17x = 5,878,840.25
5. Step 5: Solve for x
   x = 5,878,840.25/2,113.17
6. Step 6: Final answer
   x = 2,782.01