Finding the Fourth Proportional to 2,630.86, 3,951.55 and 1,645.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.86 : 3,951.55 = 1,645.43 : x
2. Step 2: Convert to fraction form
   2,630.86/3,951.55 = 1,645.43/x
3. Step 3: Cross multiply
   2,630.86x = 3,951.55 × 1,645.43
4. Step 4: Simplify right side
   2,630.86x = 6,501,998.92
5. Step 5: Solve for x
   x = 6,501,998.92/2,630.86
6. Step 6: Final answer
   x = 2,471.43