Finding the Fourth Proportional to 12,426.62, 18,643.98 and 5,853.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,426.62 : 18,643.98 = 5,853.47 : x
2. Step 2: Convert to fraction form
   12,426.62/18,643.98 = 5,853.47/x
3. Step 3: Cross multiply
   12,426.62x = 18,643.98 × 5,853.47
4. Step 4: Simplify right side
   12,426.62x = 109,131,977.61
5. Step 5: Solve for x
   x = 109,131,977.61/12,426.62
6. Step 6: Final answer
   x = 8,782.11