Finding the Fourth Proportional to 22,213.52, 30,648.72 and 13,256.96

Step by Step Solution

1. Step 1: Write the proportion equation
   22,213.52 : 30,648.72 = 13,256.96 : x
2. Step 2: Convert to fraction form
   22,213.52/30,648.72 = 13,256.96/x
3. Step 3: Cross multiply
   22,213.52x = 30,648.72 × 13,256.96
4. Step 4: Simplify right side
   22,213.52x = 406,308,855.09
5. Step 5: Solve for x
   x = 406,308,855.09/22,213.52
6. Step 6: Final answer
   x = 18,291.06