Finding the Fourth Proportional to 12,864.21, 17,752.94 and 7,559.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,864.21 : 17,752.94 = 7,559.31 : x
2. Step 2: Convert to fraction form
   12,864.21/17,752.94 = 7,559.31/x
3. Step 3: Cross multiply
   12,864.21x = 17,752.94 × 7,559.31
4. Step 4: Simplify right side
   12,864.21x = 134,199,976.87
5. Step 5: Solve for x
   x = 134,199,976.87/12,864.21
6. Step 6: Final answer
   x = 10,432.04