Finding the Fourth Proportional to 22,209, 30,647.52 and 12,137.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,209 : 30,647.52 = 12,137.78 : x
2. Step 2: Convert to fraction form
   22,209/30,647.52 = 12,137.78/x
3. Step 3: Cross multiply
   22,209x = 30,647.52 × 12,137.78
4. Step 4: Simplify right side
   22,209x = 371,992,855.31
5. Step 5: Solve for x
   x = 371,992,855.31/22,209
6. Step 6: Final answer
   x = 16,749.64