Finding the Fourth Proportional to 22,189.32, 30,621.45 and 12,117.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,189.32 : 30,621.45 = 12,117.88 : x
2. Step 2: Convert to fraction form
   22,189.32/30,621.45 = 12,117.88/x
3. Step 3: Cross multiply
   22,189.32x = 30,621.45 × 12,117.88
4. Step 4: Simplify right side
   22,189.32x = 371,067,056.53
5. Step 5: Solve for x
   x = 371,067,056.53/22,189.32
6. Step 6: Final answer
   x = 16,722.78