Finding the Fourth Proportional to 2,723.01, 4,086.33 and 991.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,723.01 : 4,086.33 = 991.63 : x
2. Step 2: Convert to fraction form
   2,723.01/4,086.33 = 991.63/x
3. Step 3: Cross multiply
   2,723.01x = 4,086.33 × 991.63
4. Step 4: Simplify right side
   2,723.01x = 4,052,127.42
5. Step 5: Solve for x
   x = 4,052,127.42/2,723.01
6. Step 6: Final answer
   x = 1,488.11