Finding the Fourth Proportional to 1,538.28, 2,311.56 and 845.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,538.28 : 2,311.56 = 845.46 : x
2. Step 2: Convert to fraction form
   1,538.28/2,311.56 = 845.46/x
3. Step 3: Cross multiply
   1,538.28x = 2,311.56 × 845.46
4. Step 4: Simplify right side
   1,538.28x = 1,954,331.52
5. Step 5: Solve for x
   x = 1,954,331.52/1,538.28
6. Step 6: Final answer
   x = 1,270.47