Finding the Fourth Proportional to 1,338.28, 1,845.79 and 1,022.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.28 : 1,845.79 = 1,022.76 : x
2. Step 2: Convert to fraction form
   1,338.28/1,845.79 = 1,022.76/x
3. Step 3: Cross multiply
   1,338.28x = 1,845.79 × 1,022.76
4. Step 4: Simplify right side
   1,338.28x = 1,887,795.07
5. Step 5: Solve for x
   x = 1,887,795.07/1,338.28
6. Step 6: Final answer
   x = 1,410.61