Finding the Fourth Proportional to 1,047.80, 1,445.88 and 605.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.80 : 1,445.88 = 605.72 : x
2. Step 2: Convert to fraction form
   1,047.80/1,445.88 = 605.72/x
3. Step 3: Cross multiply
   1,047.80x = 1,445.88 × 605.72
4. Step 4: Simplify right side
   1,047.80x = 875,798.43
5. Step 5: Solve for x
   x = 875,798.43/1,047.80
6. Step 6: Final answer
   x = 835.85