Finding the Fourth Proportional to 3,100.06, 4,648.55 and 991.41

Step by Step Solution

1. Step 1: Write the proportion equation
   3,100.06 : 4,648.55 = 991.41 : x
2. Step 2: Convert to fraction form
   3,100.06/4,648.55 = 991.41/x
3. Step 3: Cross multiply
   3,100.06x = 4,648.55 × 991.41
4. Step 4: Simplify right side
   3,100.06x = 4,608,618.96
5. Step 5: Solve for x
   x = 4,608,618.96/3,100.06
6. Step 6: Final answer
   x = 1,486.62