Finding the Fourth Proportional to 12,105.32, 18,165.90 and 5,180.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,105.32 : 18,165.90 = 5,180.36 : x
2. Step 2: Convert to fraction form
   12,105.32/18,165.90 = 5,180.36/x
3. Step 3: Cross multiply
   12,105.32x = 18,165.90 × 5,180.36
4. Step 4: Simplify right side
   12,105.32x = 94,105,901.72
5. Step 5: Solve for x
   x = 94,105,901.72/12,105.32
6. Step 6: Final answer
   x = 7,773.93