Finding the Fourth Proportional to 12,422.43, 18,636.69 and 10,205.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,422.43 : 18,636.69 = 10,205.01 : x
2. Step 2: Convert to fraction form
   12,422.43/18,636.69 = 10,205.01/x
3. Step 3: Cross multiply
   12,422.43x = 18,636.69 × 10,205.01
4. Step 4: Simplify right side
   12,422.43x = 190,187,607.82
5. Step 5: Solve for x
   x = 190,187,607.82/12,422.43
6. Step 6: Final answer
   x = 15,310.02