Finding the Fourth Proportional to 7,123.29, 10,688.76 and 3,660.54

Step by Step Solution

1. Step 1: Write the proportion equation
   7,123.29 : 10,688.76 = 3,660.54 : x
2. Step 2: Convert to fraction form
   7,123.29/10,688.76 = 3,660.54/x
3. Step 3: Cross multiply
   7,123.29x = 10,688.76 × 3,660.54
4. Step 4: Simplify right side
   7,123.29x = 39,126,633.53
5. Step 5: Solve for x
   x = 39,126,633.53/7,123.29
6. Step 6: Final answer
   x = 5,492.78