Finding the Fourth Proportional to 19,665.87, 27,138.72 and 10,713.34

Step by Step Solution

1. Step 1: Write the proportion equation
   19,665.87 : 27,138.72 = 10,713.34 : x
2. Step 2: Convert to fraction form
   19,665.87/27,138.72 = 10,713.34/x
3. Step 3: Cross multiply
   19,665.87x = 27,138.72 × 10,713.34
4. Step 4: Simplify right side
   19,665.87x = 290,746,334.52
5. Step 5: Solve for x
   x = 290,746,334.52/19,665.87
6. Step 6: Final answer
   x = 14,784.31