Finding the Fourth Proportional to 12,109.12, 18,162.32 and 3,345.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,109.12 : 18,162.32 = 3,345.28 : x
2. Step 2: Convert to fraction form
   12,109.12/18,162.32 = 3,345.28/x
3. Step 3: Cross multiply
   12,109.12x = 18,162.32 × 3,345.28
4. Step 4: Simplify right side
   12,109.12x = 60,758,045.85
5. Step 5: Solve for x
   x = 60,758,045.85/12,109.12
6. Step 6: Final answer
   x = 5,017.54