Finding the Fourth Proportional to 1,038.82, 1,555.89 and 764.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038.82 : 1,555.89 = 764.23 : x
2. Step 2: Convert to fraction form
   1,038.82/1,555.89 = 764.23/x
3. Step 3: Cross multiply
   1,038.82x = 1,555.89 × 764.23
4. Step 4: Simplify right side
   1,038.82x = 1,189,057.81
5. Step 5: Solve for x
   x = 1,189,057.81/1,038.82
6. Step 6: Final answer
   x = 1,144.62