Finding the Fourth Proportional to 1,353.86, 1,868.16 and 764.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.86 : 1,868.16 = 764.36 : x
2. Step 2: Convert to fraction form
   1,353.86/1,868.16 = 764.36/x
3. Step 3: Cross multiply
   1,353.86x = 1,868.16 × 764.36
4. Step 4: Simplify right side
   1,353.86x = 1,427,946.78
5. Step 5: Solve for x
   x = 1,427,946.78/1,353.86
6. Step 6: Final answer
   x = 1,054.72