Finding the Fourth Proportional to 12,493, 18,763.34 and 7,238.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,493 : 18,763.34 = 7,238.56 : x
2. Step 2: Convert to fraction form
   12,493/18,763.34 = 7,238.56/x
3. Step 3: Cross multiply
   12,493x = 18,763.34 × 7,238.56
4. Step 4: Simplify right side
   12,493x = 135,819,562.39
5. Step 5: Solve for x
   x = 135,819,562.39/12,493
6. Step 6: Final answer
   x = 10,871.65