Finding the Fourth Proportional to 2,636.38, 3,952.38 and 992.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.38 : 3,952.38 = 992.02 : x
2. Step 2: Convert to fraction form
   2,636.38/3,952.38 = 992.02/x
3. Step 3: Cross multiply
   2,636.38x = 3,952.38 × 992.02
4. Step 4: Simplify right side
   2,636.38x = 3,920,840.01
5. Step 5: Solve for x
   x = 3,920,840.01/2,636.38
6. Step 6: Final answer
   x = 1,487.21