Finding the Fourth Proportional to 12,859.33, 17,744.15 and 7,480.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,859.33 : 17,744.15 = 7,480.30 : x
2. Step 2: Convert to fraction form
   12,859.33/17,744.15 = 7,480.30/x
3. Step 3: Cross multiply
   12,859.33x = 17,744.15 × 7,480.30
4. Step 4: Simplify right side
   12,859.33x = 132,731,439.12
5. Step 5: Solve for x
   x = 132,731,439.12/12,859.33
6. Step 6: Final answer
   x = 10,321.80