Finding the Fourth Proportional to 20,396.42, 30,528.96 and 10,522.10

Step by Step Solution

1. Step 1: Write the proportion equation
   20,396.42 : 30,528.96 = 10,522.10 : x
2. Step 2: Convert to fraction form
   20,396.42/30,528.96 = 10,522.10/x
3. Step 3: Cross multiply
   20,396.42x = 30,528.96 × 10,522.10
4. Step 4: Simplify right side
   20,396.42x = 321,228,770.02
5. Step 5: Solve for x
   x = 321,228,770.02/20,396.42
6. Step 6: Final answer
   x = 15,749.27