Finding the Fourth Proportional to 2,168.16, 2,985.12 and 1,892.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.16 : 2,985.12 = 1,892.16 : x
2. Step 2: Convert to fraction form
   2,168.16/2,985.12 = 1,892.16/x
3. Step 3: Cross multiply
   2,168.16x = 2,985.12 × 1,892.16
4. Step 4: Simplify right side
   2,168.16x = 5,648,324.66
5. Step 5: Solve for x
   x = 5,648,324.66/2,168.16
6. Step 6: Final answer
   x = 2,605.12