Finding the Fourth Proportional to 1,353.91, 1,868.42 and 764.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.91 : 1,868.42 = 764.49 : x
2. Step 2: Convert to fraction form
   1,353.91/1,868.42 = 764.49/x
3. Step 3: Cross multiply
   1,353.91x = 1,868.42 × 764.49
4. Step 4: Simplify right side
   1,353.91x = 1,428,388.41
5. Step 5: Solve for x
   x = 1,428,388.41/1,353.91
6. Step 6: Final answer
   x = 1,055.01