Finding the Fourth Proportional to 42,003.86, 63,018.09 and 12,422.48

Step by Step Solution

1. Step 1: Write the proportion equation
   42,003.86 : 63,018.09 = 12,422.48 : x
2. Step 2: Convert to fraction form
   42,003.86/63,018.09 = 12,422.48/x
3. Step 3: Cross multiply
   42,003.86x = 63,018.09 × 12,422.48
4. Step 4: Simplify right side
   42,003.86x = 782,840,647.57
5. Step 5: Solve for x
   x = 782,840,647.57/42,003.86
6. Step 6: Final answer
   x = 18,637.35