Finding the Fourth Proportional to 1,047.40, 1,445.67 and 605.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.40 : 1,445.67 = 605.55 : x
2. Step 2: Convert to fraction form
   1,047.40/1,445.67 = 605.55/x
3. Step 3: Cross multiply
   1,047.40x = 1,445.67 × 605.55
4. Step 4: Simplify right side
   1,047.40x = 875,430.89
5. Step 5: Solve for x
   x = 875,430.89/1,047.40
6. Step 6: Final answer
   x = 835.82