Finding the Fourth Proportional to 1,378.59, 1,902.48 and 757.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378.59 : 1,902.48 = 757.59 : x
2. Step 2: Convert to fraction form
   1,378.59/1,902.48 = 757.59/x
3. Step 3: Cross multiply
   1,378.59x = 1,902.48 × 757.59
4. Step 4: Simplify right side
   1,378.59x = 1,441,299.82
5. Step 5: Solve for x
   x = 1,441,299.82/1,378.59
6. Step 6: Final answer
   x = 1,045.49