Finding the Fourth Proportional to 12,470.23, 17,205.33 and 7,688.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,470.23 : 17,205.33 = 7,688.56 : x
2. Step 2: Convert to fraction form
   12,470.23/17,205.33 = 7,688.56/x
3. Step 3: Cross multiply
   12,470.23x = 17,205.33 × 7,688.56
4. Step 4: Simplify right side
   12,470.23x = 132,284,212.02
5. Step 5: Solve for x
   x = 132,284,212.02/12,470.23
6. Step 6: Final answer
   x = 10,608.00