Finding the Fourth Proportional to 1,047.86, 1,570.35 and 662.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.86 : 1,570.35 = 662.42 : x
2. Step 2: Convert to fraction form
   1,047.86/1,570.35 = 662.42/x
3. Step 3: Cross multiply
   1,047.86x = 1,570.35 × 662.42
4. Step 4: Simplify right side
   1,047.86x = 1,040,231.25
5. Step 5: Solve for x
   x = 1,040,231.25/1,047.86
6. Step 6: Final answer
   x = 992.72