Finding the Fourth Proportional to 22,260, 30,718.86 and 12,188.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,260 : 30,718.86 = 12,188.52 : x
2. Step 2: Convert to fraction form
   22,260/30,718.86 = 12,188.52/x
3. Step 3: Cross multiply
   22,260x = 30,718.86 × 12,188.52
4. Step 4: Simplify right side
   22,260x = 374,417,439.49
5. Step 5: Solve for x
   x = 374,417,439.49/22,260
6. Step 6: Final answer
   x = 16,820.19