Finding the Fourth Proportional to 12,839.42, 17,727.12 and 8,313.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,839.42 : 17,727.12 = 8,313.01 : x
2. Step 2: Convert to fraction form
   12,839.42/17,727.12 = 8,313.01/x
3. Step 3: Cross multiply
   12,839.42x = 17,727.12 × 8,313.01
4. Step 4: Simplify right side
   12,839.42x = 147,365,595.63
5. Step 5: Solve for x
   x = 147,365,595.63/12,839.42
6. Step 6: Final answer
   x = 11,477.59