Finding the Fourth Proportional to 2,118.02, 3,172.17 and 1,996.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.02 : 3,172.17 = 1,996.52 : x
2. Step 2: Convert to fraction form
   2,118.02/3,172.17 = 1,996.52/x
3. Step 3: Cross multiply
   2,118.02x = 3,172.17 × 1,996.52
4. Step 4: Simplify right side
   2,118.02x = 6,333,300.85
5. Step 5: Solve for x
   x = 6,333,300.85/2,118.02
6. Step 6: Final answer
   x = 2,990.20