Finding the Fourth Proportional to 1,113.24, 1,670.09 and 650.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.24 : 1,670.09 = 650.78 : x
2. Step 2: Convert to fraction form
   1,113.24/1,670.09 = 650.78/x
3. Step 3: Cross multiply
   1,113.24x = 1,670.09 × 650.78
4. Step 4: Simplify right side
   1,113.24x = 1,086,870.71
5. Step 5: Solve for x
   x = 1,086,870.71/1,113.24
6. Step 6: Final answer
   x = 976.31