Finding the Fourth Proportional to 2,635.35, 3,951.95 and 991.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.35 : 3,951.95 = 991.02 : x
2. Step 2: Convert to fraction form
   2,635.35/3,951.95 = 991.02/x
3. Step 3: Cross multiply
   2,635.35x = 3,951.95 × 991.02
4. Step 4: Simplify right side
   2,635.35x = 3,916,456.53
5. Step 5: Solve for x
   x = 3,916,456.53/2,635.35
6. Step 6: Final answer
   x = 1,486.12