Finding the Fourth Proportional to 3,967.88, 5,475.68 and 2,199.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,967.88 : 5,475.68 = 2,199.50 : x
2. Step 2: Convert to fraction form
   3,967.88/5,475.68 = 2,199.50/x
3. Step 3: Cross multiply
   3,967.88x = 5,475.68 × 2,199.50
4. Step 4: Simplify right side
   3,967.88x = 12,043,719.78
5. Step 5: Solve for x
   x = 12,043,719.78/3,967.88
6. Step 6: Final answer
   x = 3,035.31