Finding the Fourth Proportional to 8,620.72, 12,932.16 and 4,238.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,620.72 : 12,932.16 = 4,238.32 : x
2. Step 2: Convert to fraction form
   8,620.72/12,932.16 = 4,238.32/x
3. Step 3: Cross multiply
   8,620.72x = 12,932.16 × 4,238.32
4. Step 4: Simplify right side
   8,620.72x = 54,810,632.37
5. Step 5: Solve for x
   x = 54,810,632.37/8,620.72
6. Step 6: Final answer
   x = 6,358.01