Finding the Fourth Proportional to 2,108.18, 3,164.18 and 1,068.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.18 : 3,164.18 = 1,068.90 : x
2. Step 2: Convert to fraction form
   2,108.18/3,164.18 = 1,068.90/x
3. Step 3: Cross multiply
   2,108.18x = 3,164.18 × 1,068.90
4. Step 4: Simplify right side
   2,108.18x = 3,382,186.66
5. Step 5: Solve for x
   x = 3,382,186.66/2,108.18
6. Step 6: Final answer
   x = 1,604.32