Finding the Fourth Proportional to 1,047.38, 1,445.34 and 605.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.38 : 1,445.34 = 605.30 : x
2. Step 2: Convert to fraction form
   1,047.38/1,445.34 = 605.30/x
3. Step 3: Cross multiply
   1,047.38x = 1,445.34 × 605.30
4. Step 4: Simplify right side
   1,047.38x = 874,864.30
5. Step 5: Solve for x
   x = 874,864.30/1,047.38
6. Step 6: Final answer
   x = 835.29