Finding the Fourth Proportional to 19,630.72, 27,090.58 and 10,678.42

Step by Step Solution

1. Step 1: Write the proportion equation
   19,630.72 : 27,090.58 = 10,678.42 : x
2. Step 2: Convert to fraction form
   19,630.72/27,090.58 = 10,678.42/x
3. Step 3: Cross multiply
   19,630.72x = 27,090.58 × 10,678.42
4. Step 4: Simplify right side
   19,630.72x = 289,284,591.28
5. Step 5: Solve for x
   x = 289,284,591.28/19,630.72
6. Step 6: Final answer
   x = 14,736.32