Finding the Fourth Proportional to 7,123.70, 10,689.58 and 3,836.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,123.70 : 10,689.58 = 3,836.72 : x
2. Step 2: Convert to fraction form
   7,123.70/10,689.58 = 3,836.72/x
3. Step 3: Cross multiply
   7,123.70x = 10,689.58 × 3,836.72
4. Step 4: Simplify right side
   7,123.70x = 41,012,925.38
5. Step 5: Solve for x
   x = 41,012,925.38/7,123.70
6. Step 6: Final answer
   x = 5,757.25