Finding the Fourth Proportional to 12,106.18, 18,158.80 and 3,340.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,106.18 : 18,158.80 = 3,340.87 : x
2. Step 2: Convert to fraction form
   12,106.18/18,158.80 = 3,340.87/x
3. Step 3: Cross multiply
   12,106.18x = 18,158.80 × 3,340.87
4. Step 4: Simplify right side
   12,106.18x = 60,666,190.16
5. Step 5: Solve for x
   x = 60,666,190.16/12,106.18
6. Step 6: Final answer
   x = 5,011.18