Finding the Fourth Proportional to 12,472.59, 17,212.35 and 7,439.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,472.59 : 17,212.35 = 7,439.73 : x
2. Step 2: Convert to fraction form
   12,472.59/17,212.35 = 7,439.73/x
3. Step 3: Cross multiply
   12,472.59x = 17,212.35 × 7,439.73
4. Step 4: Simplify right side
   12,472.59x = 128,055,236.67
5. Step 5: Solve for x
   x = 128,055,236.67/12,472.59
6. Step 6: Final answer
   x = 10,266.93