Finding the Fourth Proportional to 3,300.41, 4,950.60 and 991.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,300.41 : 4,950.60 = 991.91 : x
2. Step 2: Convert to fraction form
   3,300.41/4,950.60 = 991.91/x
3. Step 3: Cross multiply
   3,300.41x = 4,950.60 × 991.91
4. Step 4: Simplify right side
   3,300.41x = 4,910,558.30
5. Step 5: Solve for x
   x = 4,910,558.30/3,300.41
6. Step 6: Final answer
   x = 1,487.86