Finding the Fourth Proportional to 5,302.72, 7,317.20 and 3,065.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,302.72 : 7,317.20 = 3,065.31 : x
2. Step 2: Convert to fraction form
   5,302.72/7,317.20 = 3,065.31/x
3. Step 3: Cross multiply
   5,302.72x = 7,317.20 × 3,065.31
4. Step 4: Simplify right side
   5,302.72x = 22,429,494.00
5. Step 5: Solve for x
   x = 22,429,494.00/5,302.72
6. Step 6: Final answer
   x = 4,229.81