Finding the Fourth Proportional to 12,112.16, 18,164.07 and 4,212.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,112.16 : 18,164.07 = 4,212.59 : x
2. Step 2: Convert to fraction form
   12,112.16/18,164.07 = 4,212.59/x
3. Step 3: Cross multiply
   12,112.16x = 18,164.07 × 4,212.59
4. Step 4: Simplify right side
   12,112.16x = 76,517,688.82
5. Step 5: Solve for x
   x = 76,517,688.82/12,112.16
6. Step 6: Final answer
   x = 6,317.43