Finding the Fourth Proportional to 42,131.39, 63,198.41 and 18,426.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,131.39 : 63,198.41 = 18,426.74 : x
2. Step 2: Convert to fraction form
   42,131.39/63,198.41 = 18,426.74/x
3. Step 3: Cross multiply
   42,131.39x = 63,198.41 × 18,426.74
4. Step 4: Simplify right side
   42,131.39x = 1,164,540,261.36
5. Step 5: Solve for x
   x = 1,164,540,261.36/42,131.39
6. Step 6: Final answer
   x = 27,640.68