Finding the Fourth Proportional to 1,918.50, 2,879.37 and 764.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,918.50 : 2,879.37 = 764.25 : x
2. Step 2: Convert to fraction form
   1,918.50/2,879.37 = 764.25/x
3. Step 3: Cross multiply
   1,918.50x = 2,879.37 × 764.25
4. Step 4: Simplify right side
   1,918.50x = 2,200,558.52
5. Step 5: Solve for x
   x = 2,200,558.52/1,918.50
6. Step 6: Final answer
   x = 1,147.02