Finding the Fourth Proportional to 22,188.69, 30,620.16 and 12,117.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,188.69 : 30,620.16 = 12,117.10 : x
2. Step 2: Convert to fraction form
   22,188.69/30,620.16 = 12,117.10/x
3. Step 3: Cross multiply
   22,188.69x = 30,620.16 × 12,117.10
4. Step 4: Simplify right side
   22,188.69x = 371,027,540.74
5. Step 5: Solve for x
   x = 371,027,540.74/22,188.69
6. Step 6: Final answer
   x = 16,721.47