Finding the Fourth Proportional to 22,188.59, 30,620.51 and 12,117.15

Step by Step Solution

1. Step 1: Write the proportion equation
   22,188.59 : 30,620.51 = 12,117.15 : x
2. Step 2: Convert to fraction form
   22,188.59/30,620.51 = 12,117.15/x
3. Step 3: Cross multiply
   22,188.59x = 30,620.51 × 12,117.15
4. Step 4: Simplify right side
   22,188.59x = 371,033,412.43
5. Step 5: Solve for x
   x = 371,033,412.43/22,188.59
6. Step 6: Final answer
   x = 16,721.81