Finding the Fourth Proportional to 1,353.80, 1,868.33 and 764.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.80 : 1,868.33 = 764.33 : x
2. Step 2: Convert to fraction form
   1,353.80/1,868.33 = 764.33/x
3. Step 3: Cross multiply
   1,353.80x = 1,868.33 × 764.33
4. Step 4: Simplify right side
   1,353.80x = 1,428,013.24
5. Step 5: Solve for x
   x = 1,428,013.24/1,353.80
6. Step 6: Final answer
   x = 1,054.82