Finding the Fourth Proportional to 12,783.16, 17,645.57 and 7,479.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,783.16 : 17,645.57 = 7,479.68 : x
2. Step 2: Convert to fraction form
   12,783.16/17,645.57 = 7,479.68/x
3. Step 3: Cross multiply
   12,783.16x = 17,645.57 × 7,479.68
4. Step 4: Simplify right side
   12,783.16x = 131,983,279.83
5. Step 5: Solve for x
   x = 131,983,279.83/12,783.16
6. Step 6: Final answer
   x = 10,324.78