Finding the Fourth Proportional to 43,142.22, 64,716.12 and 13,561.20

Step by Step Solution

1. Step 1: Write the proportion equation
   43,142.22 : 64,716.12 = 13,561.20 : x
2. Step 2: Convert to fraction form
   43,142.22/64,716.12 = 13,561.20/x
3. Step 3: Cross multiply
   43,142.22x = 64,716.12 × 13,561.20
4. Step 4: Simplify right side
   43,142.22x = 877,628,246.54
5. Step 5: Solve for x
   x = 877,628,246.54/43,142.22
6. Step 6: Final answer
   x = 20,342.68