Finding the Fourth Proportional to 2,637.22, 3,952.78 and 992.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,637.22 : 3,952.78 = 992.71 : x
2. Step 2: Convert to fraction form
   2,637.22/3,952.78 = 992.71/x
3. Step 3: Cross multiply
   2,637.22x = 3,952.78 × 992.71
4. Step 4: Simplify right side
   2,637.22x = 3,923,964.23
5. Step 5: Solve for x
   x = 3,923,964.23/2,637.22
6. Step 6: Final answer
   x = 1,487.92