Finding the Fourth Proportional to 2,634.86, 3,630.49 and 2,161.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,634.86 : 3,630.49 = 2,161.15 : x
2. Step 2: Convert to fraction form
   2,634.86/3,630.49 = 2,161.15/x
3. Step 3: Cross multiply
   2,634.86x = 3,630.49 × 2,161.15
4. Step 4: Simplify right side
   2,634.86x = 7,846,018.98
5. Step 5: Solve for x
   x = 7,846,018.98/2,634.86
6. Step 6: Final answer
   x = 2,977.77