Finding the Fourth Proportional to 22,140.37, 30,552.59 and 12,579

Step by Step Solution

1. Step 1: Write the proportion equation
   22,140.37 : 30,552.59 = 12,579 : x
2. Step 2: Convert to fraction form
   22,140.37/30,552.59 = 12,579/x
3. Step 3: Cross multiply
   22,140.37x = 30,552.59 × 12,579
4. Step 4: Simplify right side
   22,140.37x = 384,321,029.61
5. Step 5: Solve for x
   x = 384,321,029.61/22,140.37
6. Step 6: Final answer
   x = 17,358.39