Finding the Fourth Proportional to 1,047.38, 1,445.36 and 605.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.38 : 1,445.36 = 605.31 : x
2. Step 2: Convert to fraction form
   1,047.38/1,445.36 = 605.31/x
3. Step 3: Cross multiply
   1,047.38x = 1,445.36 × 605.31
4. Step 4: Simplify right side
   1,047.38x = 874,887.84
5. Step 5: Solve for x
   x = 874,887.84/1,047.38
6. Step 6: Final answer
   x = 835.31