Finding the Fourth Proportional to 1,054.77, 1,581.81 and 499.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.77 : 1,581.81 = 499.42 : x
2. Step 2: Convert to fraction form
   1,054.77/1,581.81 = 499.42/x
3. Step 3: Cross multiply
   1,054.77x = 1,581.81 × 499.42
4. Step 4: Simplify right side
   1,054.77x = 789,987.55
5. Step 5: Solve for x
   x = 789,987.55/1,054.77
6. Step 6: Final answer
   x = 748.97