Finding the Fourth Proportional to 1,353.92, 1,868.53 and 764.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.92 : 1,868.53 = 764.57 : x
2. Step 2: Convert to fraction form
   1,353.92/1,868.53 = 764.57/x
3. Step 3: Cross multiply
   1,353.92x = 1,868.53 × 764.57
4. Step 4: Simplify right side
   1,353.92x = 1,428,610.73
5. Step 5: Solve for x
   x = 1,428,610.73/1,353.92
6. Step 6: Final answer
   x = 1,055.16