Finding the Fourth Proportional to 41,318, 61,986.72 and 13,616

Step by Step Solution

1. Step 1: Write the proportion equation
   41,318 : 61,986.72 = 13,616 : x
2. Step 2: Convert to fraction form
   41,318/61,986.72 = 13,616/x
3. Step 3: Cross multiply
   41,318x = 61,986.72 × 13,616
4. Step 4: Simplify right side
   41,318x = 844,011,179.52
5. Step 5: Solve for x
   x = 844,011,179.52/41,318
6. Step 6: Final answer
   x = 20,427.20