Finding the Fourth Proportional to 1,379.50, 1,903.72 and 758.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.50 : 1,903.72 = 758.50 : x
2. Step 2: Convert to fraction form
   1,379.50/1,903.72 = 758.50/x
3. Step 3: Cross multiply
   1,379.50x = 1,903.72 × 758.50
4. Step 4: Simplify right side
   1,379.50x = 1,443,971.62
5. Step 5: Solve for x
   x = 1,443,971.62/1,379.50
6. Step 6: Final answer
   x = 1,046.74