Finding the Fourth Proportional to 22,081.30, 30,473.48 and 12,521.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,081.30 : 30,473.48 = 12,521.57 : x
2. Step 2: Convert to fraction form
   22,081.30/30,473.48 = 12,521.57/x
3. Step 3: Cross multiply
   22,081.30x = 30,473.48 × 12,521.57
4. Step 4: Simplify right side
   22,081.30x = 381,575,826.54
5. Step 5: Solve for x
   x = 381,575,826.54/22,081.30
6. Step 6: Final answer
   x = 17,280.50