Finding the Fourth Proportional to 995.69, 1,491.86 and 648.50

Step by Step Solution

1. Step 1: Write the proportion equation
   995.69 : 1,491.86 = 648.50 : x
2. Step 2: Convert to fraction form
   995.69/1,491.86 = 648.50/x
3. Step 3: Cross multiply
   995.69x = 1,491.86 × 648.50
4. Step 4: Simplify right side
   995.69x = 967,476.56
5. Step 5: Solve for x
   x = 967,476.56/995.69
6. Step 6: Final answer
   x = 971.67