Finding the Fourth Proportional to 19,996.56, 29,968.88 and 8,136.52

Step by Step Solution

1. Step 1: Write the proportion equation
   19,996.56 : 29,968.88 = 8,136.52 : x
2. Step 2: Convert to fraction form
   19,996.56/29,968.88 = 8,136.52/x
3. Step 3: Cross multiply
   19,996.56x = 29,968.88 × 8,136.52
4. Step 4: Simplify right side
   19,996.56x = 243,842,275.89
5. Step 5: Solve for x
   x = 243,842,275.89/19,996.56
6. Step 6: Final answer
   x = 12,194.21