Finding the Fourth Proportional to 7,123.30, 10,689.55 and 3,838.68

Step by Step Solution

1. Step 1: Write the proportion equation
   7,123.30 : 10,689.55 = 3,838.68 : x
2. Step 2: Convert to fraction form
   7,123.30/10,689.55 = 3,838.68/x
3. Step 3: Cross multiply
   7,123.30x = 10,689.55 × 3,838.68
4. Step 4: Simplify right side
   7,123.30x = 41,033,752.20
5. Step 5: Solve for x
   x = 41,033,752.20/7,123.30
6. Step 6: Final answer
   x = 5,760.50