Finding the Fourth Proportional to 2,635.37, 3,953.51 and 992.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.37 : 3,953.51 = 992.15 : x
2. Step 2: Convert to fraction form
   2,635.37/3,953.51 = 992.15/x
3. Step 3: Cross multiply
   2,635.37x = 3,953.51 × 992.15
4. Step 4: Simplify right side
   2,635.37x = 3,922,469.99
5. Step 5: Solve for x
   x = 3,922,469.99/2,635.37
6. Step 6: Final answer
   x = 1,488.39