Finding the Fourth Proportional to 22,406.72, 30,917.41 and 13,459.15

Step by Step Solution

1. Step 1: Write the proportion equation
   22,406.72 : 30,917.41 = 13,459.15 : x
2. Step 2: Convert to fraction form
   22,406.72/30,917.41 = 13,459.15/x
3. Step 3: Cross multiply
   22,406.72x = 30,917.41 × 13,459.15
4. Step 4: Simplify right side
   22,406.72x = 416,122,058.80
5. Step 5: Solve for x
   x = 416,122,058.80/22,406.72
6. Step 6: Final answer
   x = 18,571.31