Finding the Fourth Proportional to 12,212.91, 18,318.34 and 3,892.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,212.91 : 18,318.34 = 3,892.59 : x
2. Step 2: Convert to fraction form
   12,212.91/18,318.34 = 3,892.59/x
3. Step 3: Cross multiply
   12,212.91x = 18,318.34 × 3,892.59
4. Step 4: Simplify right side
   12,212.91x = 71,305,787.10
5. Step 5: Solve for x
   x = 71,305,787.10/12,212.91
6. Step 6: Final answer
   x = 5,838.56