Finding the Fourth Proportional to 2,402.78, 3,310.91 and 1,772.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,402.78 : 3,310.91 = 1,772.31 : x
2. Step 2: Convert to fraction form
   2,402.78/3,310.91 = 1,772.31/x
3. Step 3: Cross multiply
   2,402.78x = 3,310.91 × 1,772.31
4. Step 4: Simplify right side
   2,402.78x = 5,867,941.17
5. Step 5: Solve for x
   x = 5,867,941.17/2,402.78
6. Step 6: Final answer
   x = 2,442.15