Finding the Fourth Proportional to 22,191.30, 30,622.77 and 12,995.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,191.30 : 30,622.77 = 12,995.64 : x
2. Step 2: Convert to fraction form
   22,191.30/30,622.77 = 12,995.64/x
3. Step 3: Cross multiply
   22,191.30x = 30,622.77 × 12,995.64
4. Step 4: Simplify right side
   22,191.30x = 397,962,494.72
5. Step 5: Solve for x
   x = 397,962,494.72/22,191.30
6. Step 6: Final answer
   x = 17,933.27