Finding the Fourth Proportional to 1,047.31, 1,445.55 and 605.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.31 : 1,445.55 = 605.49 : x
2. Step 2: Convert to fraction form
   1,047.31/1,445.55 = 605.49/x
3. Step 3: Cross multiply
   1,047.31x = 1,445.55 × 605.49
4. Step 4: Simplify right side
   1,047.31x = 875,258.38
5. Step 5: Solve for x
   x = 875,258.38/1,047.31
6. Step 6: Final answer
   x = 835.72