Finding the Fourth Proportional to 2,078.31, 2,868.27 and 1,553.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.31 : 2,868.27 = 1,553.43 : x
2. Step 2: Convert to fraction form
   2,078.31/2,868.27 = 1,553.43/x
3. Step 3: Cross multiply
   2,078.31x = 2,868.27 × 1,553.43
4. Step 4: Simplify right side
   2,078.31x = 4,455,656.67
5. Step 5: Solve for x
   x = 4,455,656.67/2,078.31
6. Step 6: Final answer
   x = 2,143.88