Finding the Fourth Proportional to 12,736.96, 17,578.56 and 8,021.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,736.96 : 17,578.56 = 8,021.14 : x
2. Step 2: Convert to fraction form
   12,736.96/17,578.56 = 8,021.14/x
3. Step 3: Cross multiply
   12,736.96x = 17,578.56 × 8,021.14
4. Step 4: Simplify right side
   12,736.96x = 141,000,090.76
5. Step 5: Solve for x
   x = 141,000,090.76/12,736.96
6. Step 6: Final answer
   x = 11,070.15