Finding the Fourth Proportional to 22,200.41, 30,637.31 and 12,129.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,200.41 : 30,637.31 = 12,129.78 : x
2. Step 2: Convert to fraction form
   22,200.41/30,637.31 = 12,129.78/x
3. Step 3: Cross multiply
   22,200.41x = 30,637.31 × 12,129.78
4. Step 4: Simplify right side
   22,200.41x = 371,623,830.09
5. Step 5: Solve for x
   x = 371,623,830.09/22,200.41
6. Step 6: Final answer
   x = 16,739.50