Finding the Fourth Proportional to 19,617.42, 27,071.72 and 10,665.15

Step by Step Solution

1. Step 1: Write the proportion equation
   19,617.42 : 27,071.72 = 10,665.15 : x
2. Step 2: Convert to fraction form
   19,617.42/27,071.72 = 10,665.15/x
3. Step 3: Cross multiply
   19,617.42x = 27,071.72 × 10,665.15
4. Step 4: Simplify right side
   19,617.42x = 288,723,954.56
5. Step 5: Solve for x
   x = 288,723,954.56/19,617.42
6. Step 6: Final answer
   x = 14,717.73