Finding the Fourth Proportional to 22,191.30, 30,624.24 and 12,120.04

Step by Step Solution

1. Step 1: Write the proportion equation
   22,191.30 : 30,624.24 = 12,120.04 : x
2. Step 2: Convert to fraction form
   22,191.30/30,624.24 = 12,120.04/x
3. Step 3: Cross multiply
   22,191.30x = 30,624.24 × 12,120.04
4. Step 4: Simplify right side
   22,191.30x = 371,166,937.21
5. Step 5: Solve for x
   x = 371,166,937.21/22,191.30
6. Step 6: Final answer
   x = 16,725.79