Finding the Fourth Proportional to 3,151.30, 4,418.30 and 3,151.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,151.30 : 4,418.30 = 3,151.30 : x
2. Step 2: Convert to fraction form
   3,151.30/4,418.30 = 3,151.30/x
3. Step 3: Cross multiply
   3,151.30x = 4,418.30 × 3,151.30
4. Step 4: Simplify right side
   3,151.30x = 13,923,388.79
5. Step 5: Solve for x
   x = 13,923,388.79/3,151.30
6. Step 6: Final answer
   x = 4,418.30