Finding the Fourth Proportional to 2,126.83, 3,186.60 and 1,689.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,126.83 : 3,186.60 = 1,689.43 : x
2. Step 2: Convert to fraction form
   2,126.83/3,186.60 = 1,689.43/x
3. Step 3: Cross multiply
   2,126.83x = 3,186.60 × 1,689.43
4. Step 4: Simplify right side
   2,126.83x = 5,383,521.22
5. Step 5: Solve for x
   x = 5,383,521.22/2,126.83
6. Step 6: Final answer
   x = 2,531.24