Finding the Fourth Proportional to 8,301.20, 12,438.83 and 5,216.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,301.20 : 12,438.83 = 5,216.72 : x
2. Step 2: Convert to fraction form
   8,301.20/12,438.83 = 5,216.72/x
3. Step 3: Cross multiply
   8,301.20x = 12,438.83 × 5,216.72
4. Step 4: Simplify right side
   8,301.20x = 64,889,893.24
5. Step 5: Solve for x
   x = 64,889,893.24/8,301.20
6. Step 6: Final answer
   x = 7,816.93