Finding the Fourth Proportional to 1,493.31, 2,240.79 and 723.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,493.31 : 2,240.79 = 723.81 : x
2. Step 2: Convert to fraction form
   1,493.31/2,240.79 = 723.81/x
3. Step 3: Cross multiply
   1,493.31x = 2,240.79 × 723.81
4. Step 4: Simplify right side
   1,493.31x = 1,621,906.21
5. Step 5: Solve for x
   x = 1,621,906.21/1,493.31
6. Step 6: Final answer
   x = 1,086.11