Finding the Fourth Proportional to 1,354.28, 1,868.38 and 764.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.28 : 1,868.38 = 764.68 : x
2. Step 2: Convert to fraction form
   1,354.28/1,868.38 = 764.68/x
3. Step 3: Cross multiply
   1,354.28x = 1,868.38 × 764.68
4. Step 4: Simplify right side
   1,354.28x = 1,428,712.82
5. Step 5: Solve for x
   x = 1,428,712.82/1,354.28
6. Step 6: Final answer
   x = 1,054.96