Finding the Fourth Proportional to 2,723.89, 4,086.45 and 992.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,723.89 : 4,086.45 = 992.50 : x
2. Step 2: Convert to fraction form
   2,723.89/4,086.45 = 992.50/x
3. Step 3: Cross multiply
   2,723.89x = 4,086.45 × 992.50
4. Step 4: Simplify right side
   2,723.89x = 4,055,801.63
5. Step 5: Solve for x
   x = 4,055,801.63/2,723.89
6. Step 6: Final answer
   x = 1,488.97