Finding the Fourth Proportional to 12,868.02, 19,288.81 and 7,309.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,868.02 : 19,288.81 = 7,309.49 : x
2. Step 2: Convert to fraction form
   12,868.02/19,288.81 = 7,309.49/x
3. Step 3: Cross multiply
   12,868.02x = 19,288.81 × 7,309.49
4. Step 4: Simplify right side
   12,868.02x = 140,991,327.26
5. Step 5: Solve for x
   x = 140,991,327.26/12,868.02
6. Step 6: Final answer
   x = 10,956.73