Finding the Fourth Proportional to 2,290.98, 3,437.72 and 992.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.98 : 3,437.72 = 992.55 : x
2. Step 2: Convert to fraction form
   2,290.98/3,437.72 = 992.55/x
3. Step 3: Cross multiply
   2,290.98x = 3,437.72 × 992.55
4. Step 4: Simplify right side
   2,290.98x = 3,412,104.02
5. Step 5: Solve for x
   x = 3,412,104.02/2,290.98
6. Step 6: Final answer
   x = 1,489.36