Finding the Fourth Proportional to 42,198.27, 63,287.98 and 12,612.26

Step by Step Solution

1. Step 1: Write the proportion equation
   42,198.27 : 63,287.98 = 12,612.26 : x
2. Step 2: Convert to fraction form
   42,198.27/63,287.98 = 12,612.26/x
3. Step 3: Cross multiply
   42,198.27x = 63,287.98 × 12,612.26
4. Step 4: Simplify right side
   42,198.27x = 798,204,300.27
5. Step 5: Solve for x
   x = 798,204,300.27/42,198.27
6. Step 6: Final answer
   x = 18,915.57