Finding the Fourth Proportional to 12,118.33, 18,158.96 and 8,154.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,118.33 : 18,158.96 = 8,154.91 : x
2. Step 2: Convert to fraction form
   12,118.33/18,158.96 = 8,154.91/x
3. Step 3: Cross multiply
   12,118.33x = 18,158.96 × 8,154.91
4. Step 4: Simplify right side
   12,118.33x = 148,084,643.72
5. Step 5: Solve for x
   x = 148,084,643.72/12,118.33
6. Step 6: Final answer
   x = 12,219.89