Finding the Fourth Proportional to 22,317.89, 33,457.59 and 12,828.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,317.89 : 33,457.59 = 12,828.20 : x
2. Step 2: Convert to fraction form
   22,317.89/33,457.59 = 12,828.20/x
3. Step 3: Cross multiply
   22,317.89x = 33,457.59 × 12,828.20
4. Step 4: Simplify right side
   22,317.89x = 429,200,488.75
5. Step 5: Solve for x
   x = 429,200,488.75/22,317.89
6. Step 6: Final answer
   x = 19,231.23