Finding the Fourth Proportional to 1,047.78, 1,445.94 and 605.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.78 : 1,445.94 = 605.59 : x
2. Step 2: Convert to fraction form
   1,047.78/1,445.94 = 605.59/x
3. Step 3: Cross multiply
   1,047.78x = 1,445.94 × 605.59
4. Step 4: Simplify right side
   1,047.78x = 875,646.80
5. Step 5: Solve for x
   x = 875,646.80/1,047.78
6. Step 6: Final answer
   x = 835.72