Finding the Fourth Proportional to 12,472.43, 17,205.39 and 7,748.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,472.43 : 17,205.39 = 7,748.51 : x
2. Step 2: Convert to fraction form
   12,472.43/17,205.39 = 7,748.51/x
3. Step 3: Cross multiply
   12,472.43x = 17,205.39 × 7,748.51
4. Step 4: Simplify right side
   12,472.43x = 133,316,125.43
5. Step 5: Solve for x
   x = 133,316,125.43/12,472.43
6. Step 6: Final answer
   x = 10,688.86