Finding the Fourth Proportional to 2,002.52, 2,761.89 and 1,216.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,002.52 : 2,761.89 = 1,216.55 : x
2. Step 2: Convert to fraction form
   2,002.52/2,761.89 = 1,216.55/x
3. Step 3: Cross multiply
   2,002.52x = 2,761.89 × 1,216.55
4. Step 4: Simplify right side
   2,002.52x = 3,359,977.28
5. Step 5: Solve for x
   x = 3,359,977.28/2,002.52
6. Step 6: Final answer
   x = 1,677.87