Finding the Fourth Proportional to 22,296.10, 30,764.28 and 13,219.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,296.10 : 30,764.28 = 13,219.78 : x
2. Step 2: Convert to fraction form
   22,296.10/30,764.28 = 13,219.78/x
3. Step 3: Cross multiply
   22,296.10x = 30,764.28 × 13,219.78
4. Step 4: Simplify right side
   22,296.10x = 406,697,093.15
5. Step 5: Solve for x
   x = 406,697,093.15/22,296.10
6. Step 6: Final answer
   x = 18,240.73