Finding the Fourth Proportional to 2,645.83, 3,951.35 and 2,126.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.83 : 3,951.35 = 2,126.62 : x
2. Step 2: Convert to fraction form
   2,645.83/3,951.35 = 2,126.62/x
3. Step 3: Cross multiply
   2,645.83x = 3,951.35 × 2,126.62
4. Step 4: Simplify right side
   2,645.83x = 8,403,019.94
5. Step 5: Solve for x
   x = 8,403,019.94/2,645.83
6. Step 6: Final answer
   x = 3,175.95