Finding the Fourth Proportional to 2,650.31, 3,978.06 and 2,214.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,650.31 : 3,978.06 = 2,214.37 : x
2. Step 2: Convert to fraction form
   2,650.31/3,978.06 = 2,214.37/x
3. Step 3: Cross multiply
   2,650.31x = 3,978.06 × 2,214.37
4. Step 4: Simplify right side
   2,650.31x = 8,808,876.83
5. Step 5: Solve for x
   x = 8,808,876.83/2,650.31
6. Step 6: Final answer
   x = 3,323.72