Finding the Fourth Proportional to 12,426.67, 18,642.57 and 4,107.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,426.67 : 18,642.57 = 4,107.43 : x
2. Step 2: Convert to fraction form
   12,426.67/18,642.57 = 4,107.43/x
3. Step 3: Cross multiply
   12,426.67x = 18,642.57 × 4,107.43
4. Step 4: Simplify right side
   12,426.67x = 76,573,051.30
5. Step 5: Solve for x
   x = 76,573,051.30/12,426.67
6. Step 6: Final answer
   x = 6,161.99