Finding the Fourth Proportional to 12,434.38, 18,651.60 and 10,238.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,434.38 : 18,651.60 = 10,238.50 : x
2. Step 2: Convert to fraction form
   12,434.38/18,651.60 = 10,238.50/x
3. Step 3: Cross multiply
   12,434.38x = 18,651.60 × 10,238.50
4. Step 4: Simplify right side
   12,434.38x = 190,964,340.77
5. Step 5: Solve for x
   x = 190,964,340.77/12,434.38
6. Step 6: Final answer
   x = 15,357.77