Finding the Fourth Proportional to 2,635.98, 3,952.17 and 992.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.98 : 3,952.17 = 992.22 : x
2. Step 2: Convert to fraction form
   2,635.98/3,952.17 = 992.22/x
3. Step 3: Cross multiply
   2,635.98x = 3,952.17 × 992.22
4. Step 4: Simplify right side
   2,635.98x = 3,921,422.12
5. Step 5: Solve for x
   x = 3,921,422.12/2,635.98
6. Step 6: Final answer
   x = 1,487.65