Finding the Fourth Proportional to 2,199.91, 3,284.17 and 2,123.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,199.91 : 3,284.17 = 2,123.02 : x
2. Step 2: Convert to fraction form
   2,199.91/3,284.17 = 2,123.02/x
3. Step 3: Cross multiply
   2,199.91x = 3,284.17 × 2,123.02
4. Step 4: Simplify right side
   2,199.91x = 6,972,358.59
5. Step 5: Solve for x
   x = 6,972,358.59/2,199.91
6. Step 6: Final answer
   x = 3,169.38