Finding the Fourth Proportional to 22,188.57, 30,620.42 and 12,117.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,188.57 : 30,620.42 = 12,117.12 : x
2. Step 2: Convert to fraction form
   22,188.57/30,620.42 = 12,117.12/x
3. Step 3: Cross multiply
   22,188.57x = 30,620.42 × 12,117.12
4. Step 4: Simplify right side
   22,188.57x = 371,031,303.59
5. Step 5: Solve for x
   x = 371,031,303.59/22,188.57
6. Step 6: Final answer
   x = 16,721.73