Finding the Fourth Proportional to 1,011.69, 1,395.77 and 662.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,011.69 : 1,395.77 = 662.85 : x
2. Step 2: Convert to fraction form
   1,011.69/1,395.77 = 662.85/x
3. Step 3: Cross multiply
   1,011.69x = 1,395.77 × 662.85
4. Step 4: Simplify right side
   1,011.69x = 925,182.83
5. Step 5: Solve for x
   x = 925,182.83/1,011.69
6. Step 6: Final answer
   x = 914.49