Finding the Fourth Proportional to 1,379.28, 1,902.06 and 1,265.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.28 : 1,902.06 = 1,265.46 : x
2. Step 2: Convert to fraction form
   1,379.28/1,902.06 = 1,265.46/x
3. Step 3: Cross multiply
   1,379.28x = 1,902.06 × 1,265.46
4. Step 4: Simplify right side
   1,379.28x = 2,406,980.85
5. Step 5: Solve for x
   x = 2,406,980.85/1,379.28
6. Step 6: Final answer
   x = 1,745.10