Finding the Fourth Proportional to 42,806.82, 64,216.36 and 13,227.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,806.82 : 64,216.36 = 13,227.18 : x
2. Step 2: Convert to fraction form
   42,806.82/64,216.36 = 13,227.18/x
3. Step 3: Cross multiply
   42,806.82x = 64,216.36 × 13,227.18
4. Step 4: Simplify right side
   42,806.82x = 849,401,352.66
5. Step 5: Solve for x
   x = 849,401,352.66/42,806.82
6. Step 6: Final answer
   x = 19,842.66