Finding the Fourth Proportional to 8,300.71, 12,438.08 and 5,216.23

Step by Step Solution

1. Step 1: Write the proportion equation
   8,300.71 : 12,438.08 = 5,216.23 : x
2. Step 2: Convert to fraction form
   8,300.71/12,438.08 = 5,216.23/x
3. Step 3: Cross multiply
   8,300.71x = 12,438.08 × 5,216.23
4. Step 4: Simplify right side
   8,300.71x = 64,879,886.04
5. Step 5: Solve for x
   x = 64,879,886.04/8,300.71
6. Step 6: Final answer
   x = 7,816.19