Finding the Fourth Proportional to 22,188.86, 30,621 and 12,117.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,188.86 : 30,621 = 12,117.32 : x
2. Step 2: Convert to fraction form
   22,188.86/30,621 = 12,117.32/x
3. Step 3: Cross multiply
   22,188.86x = 30,621 × 12,117.32
4. Step 4: Simplify right side
   22,188.86x = 371,044,455.72
5. Step 5: Solve for x
   x = 371,044,455.72/22,188.86
6. Step 6: Final answer
   x = 16,722.11