Finding the Fourth Proportional to 12,106.17, 18,161.69 and 4,314.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,106.17 : 18,161.69 = 4,314.78 : x
2. Step 2: Convert to fraction form
   12,106.17/18,161.69 = 4,314.78/x
3. Step 3: Cross multiply
   12,106.17x = 18,161.69 × 4,314.78
4. Step 4: Simplify right side
   12,106.17x = 78,363,675.20
5. Step 5: Solve for x
   x = 78,363,675.20/12,106.17
6. Step 6: Final answer
   x = 6,473.04