Finding the Fourth Proportional to 2,520.88, 3,784.56 and 2,138.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.88 : 3,784.56 = 2,138.56 : x
2. Step 2: Convert to fraction form
   2,520.88/3,784.56 = 2,138.56/x
3. Step 3: Cross multiply
   2,520.88x = 3,784.56 × 2,138.56
4. Step 4: Simplify right side
   2,520.88x = 8,093,508.63
5. Step 5: Solve for x
   x = 8,093,508.63/2,520.88
6. Step 6: Final answer
   x = 3,210.59