Finding the Fourth Proportional to 2,634.24, 3,951.78 and 990.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,634.24 : 3,951.78 = 990.91 : x
2. Step 2: Convert to fraction form
   2,634.24/3,951.78 = 990.91/x
3. Step 3: Cross multiply
   2,634.24x = 3,951.78 × 990.91
4. Step 4: Simplify right side
   2,634.24x = 3,915,858.32
5. Step 5: Solve for x
   x = 3,915,858.32/2,634.24
6. Step 6: Final answer
   x = 1,486.52