Finding the Fourth Proportional to 2,038.56, 2,811.66 and 1,338.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,038.56 : 2,811.66 = 1,338.72 : x
2. Step 2: Convert to fraction form
   2,038.56/2,811.66 = 1,338.72/x
3. Step 3: Cross multiply
   2,038.56x = 2,811.66 × 1,338.72
4. Step 4: Simplify right side
   2,038.56x = 3,764,025.48
5. Step 5: Solve for x
   x = 3,764,025.48/2,038.56
6. Step 6: Final answer
   x = 1,846.41