Finding the Fourth Proportional to 7,002.19, 9,663.71 and 5,230.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,002.19 : 9,663.71 = 5,230.72 : x
2. Step 2: Convert to fraction form
   7,002.19/9,663.71 = 5,230.72/x
3. Step 3: Cross multiply
   7,002.19x = 9,663.71 × 5,230.72
4. Step 4: Simplify right side
   7,002.19x = 50,548,147.10
5. Step 5: Solve for x
   x = 50,548,147.10/7,002.19
6. Step 6: Final answer
   x = 7,218.90