Finding the Fourth Proportional to 57,636.58, 86,493.72 and 20,196.99

Step by Step Solution

1. Step 1: Write the proportion equation
   57,636.58 : 86,493.72 = 20,196.99 : x
2. Step 2: Convert to fraction form
   57,636.58/86,493.72 = 20,196.99/x
3. Step 3: Cross multiply
   57,636.58x = 86,493.72 × 20,196.99
4. Step 4: Simplify right side
   57,636.58x = 1,746,912,473.55
5. Step 5: Solve for x
   x = 1,746,912,473.55/57,636.58
6. Step 6: Final answer
   x = 30,309.09