Finding the Fourth Proportional to 20,581.69, 28,404.04 and 12,622.83

Step by Step Solution

1. Step 1: Write the proportion equation
   20,581.69 : 28,404.04 = 12,622.83 : x
2. Step 2: Convert to fraction form
   20,581.69/28,404.04 = 12,622.83/x
3. Step 3: Cross multiply
   20,581.69x = 28,404.04 × 12,622.83
4. Step 4: Simplify right side
   20,581.69x = 358,539,368.23
5. Step 5: Solve for x
   x = 358,539,368.23/20,581.69
6. Step 6: Final answer
   x = 17,420.31