Finding the Fourth Proportional to 8,118.63, 12,168.71 and 3,435.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,118.63 : 12,168.71 = 3,435.72 : x
2. Step 2: Convert to fraction form
   8,118.63/12,168.71 = 3,435.72/x
3. Step 3: Cross multiply
   8,118.63x = 12,168.71 × 3,435.72
4. Step 4: Simplify right side
   8,118.63x = 41,808,280.32
5. Step 5: Solve for x
   x = 41,808,280.32/8,118.63
6. Step 6: Final answer
   x = 5,149.67