Finding the Fourth Proportional to 28,362.22, 42,478.53 and 13,581.52

Step by Step Solution

1. Step 1: Write the proportion equation
   28,362.22 : 42,478.53 = 13,581.52 : x
2. Step 2: Convert to fraction form
   28,362.22/42,478.53 = 13,581.52/x
3. Step 3: Cross multiply
   28,362.22x = 42,478.53 × 13,581.52
4. Step 4: Simplify right side
   28,362.22x = 576,923,004.77
5. Step 5: Solve for x
   x = 576,923,004.77/28,362.22
6. Step 6: Final answer
   x = 20,341.25