Finding the Fourth Proportional to 2,208.63, 3,296.42 and 2,172.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,208.63 : 3,296.42 = 2,172.18 : x
2. Step 2: Convert to fraction form
   2,208.63/3,296.42 = 2,172.18/x
3. Step 3: Cross multiply
   2,208.63x = 3,296.42 × 2,172.18
4. Step 4: Simplify right side
   2,208.63x = 7,160,406.73
5. Step 5: Solve for x
   x = 7,160,406.73/2,208.63
6. Step 6: Final answer
   x = 3,242.01