Finding the Fourth Proportional to 7,002.63, 9,664.31 and 5,231.16

Step by Step Solution

1. Step 1: Write the proportion equation
   7,002.63 : 9,664.31 = 5,231.16 : x
2. Step 2: Convert to fraction form
   7,002.63/9,664.31 = 5,231.16/x
3. Step 3: Cross multiply
   7,002.63x = 9,664.31 × 5,231.16
4. Step 4: Simplify right side
   7,002.63x = 50,555,551.90
5. Step 5: Solve for x
   x = 50,555,551.90/7,002.63
6. Step 6: Final answer
   x = 7,219.51