Finding the Fourth Proportional to 12,212.71, 18,318.86 and 3,892.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,212.71 : 18,318.86 = 3,892.62 : x
2. Step 2: Convert to fraction form
   12,212.71/18,318.86 = 3,892.62/x
3. Step 3: Cross multiply
   12,212.71x = 18,318.86 × 3,892.62
4. Step 4: Simplify right side
   12,212.71x = 71,308,360.81
5. Step 5: Solve for x
   x = 71,308,360.81/12,212.71
6. Step 6: Final answer
   x = 5,838.86