Finding the Fourth Proportional to 12,472.79, 17,215.94 and 7,435.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,472.79 : 17,215.94 = 7,435.40 : x
2. Step 2: Convert to fraction form
   12,472.79/17,215.94 = 7,435.40/x
3. Step 3: Cross multiply
   12,472.79x = 17,215.94 × 7,435.40
4. Step 4: Simplify right side
   12,472.79x = 128,007,332.78
5. Step 5: Solve for x
   x = 128,007,332.78/12,472.79
6. Step 6: Final answer
   x = 10,262.93