Finding the Fourth Proportional to 2,665.31, 3,992.15 and 2,197.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.31 : 3,992.15 = 2,197.83 : x
2. Step 2: Convert to fraction form
   2,665.31/3,992.15 = 2,197.83/x
3. Step 3: Cross multiply
   2,665.31x = 3,992.15 × 2,197.83
4. Step 4: Simplify right side
   2,665.31x = 8,774,056.05
5. Step 5: Solve for x
   x = 8,774,056.05/2,665.31
6. Step 6: Final answer
   x = 3,291.95