Finding the Fourth Proportional to 7,085.72, 10,648.02 and 4,320.38

Step by Step Solution

1. Step 1: Write the proportion equation
   7,085.72 : 10,648.02 = 4,320.38 : x
2. Step 2: Convert to fraction form
   7,085.72/10,648.02 = 4,320.38/x
3. Step 3: Cross multiply
   7,085.72x = 10,648.02 × 4,320.38
4. Step 4: Simplify right side
   7,085.72x = 46,003,492.65
5. Step 5: Solve for x
   x = 46,003,492.65/7,085.72
6. Step 6: Final answer
   x = 6,492.42