Finding the Fourth Proportional to 7,287.72, 10,935.15 and 3,126.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,287.72 : 10,935.15 = 3,126.50 : x
2. Step 2: Convert to fraction form
   7,287.72/10,935.15 = 3,126.50/x
3. Step 3: Cross multiply
   7,287.72x = 10,935.15 × 3,126.50
4. Step 4: Simplify right side
   7,287.72x = 34,188,738.67
5. Step 5: Solve for x
   x = 34,188,738.67/7,287.72
6. Step 6: Final answer
   x = 4,691.28