Finding the Fourth Proportional to 22,213.56, 30,655.05 and 13,266.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,213.56 : 30,655.05 = 13,266.30 : x
2. Step 2: Convert to fraction form
   22,213.56/30,655.05 = 13,266.30/x
3. Step 3: Cross multiply
   22,213.56x = 30,655.05 × 13,266.30
4. Step 4: Simplify right side
   22,213.56x = 406,679,089.82
5. Step 5: Solve for x
   x = 406,679,089.82/22,213.56
6. Step 6: Final answer
   x = 18,307.70