Finding the Fourth Proportional to 22,200.84, 30,638.88 and 12,509.55

Step by Step Solution

1. Step 1: Write the proportion equation
   22,200.84 : 30,638.88 = 12,509.55 : x
2. Step 2: Convert to fraction form
   22,200.84/30,638.88 = 12,509.55/x
3. Step 3: Cross multiply
   22,200.84x = 30,638.88 × 12,509.55
4. Step 4: Simplify right side
   22,200.84x = 383,278,601.30
5. Step 5: Solve for x
   x = 383,278,601.30/22,200.84
6. Step 6: Final answer
   x = 17,264.15