Finding the Fourth Proportional to 1,279.30, 1,917.83 and 758.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.30 : 1,917.83 = 758.02 : x
2. Step 2: Convert to fraction form
   1,279.30/1,917.83 = 758.02/x
3. Step 3: Cross multiply
   1,279.30x = 1,917.83 × 758.02
4. Step 4: Simplify right side
   1,279.30x = 1,453,749.71
5. Step 5: Solve for x
   x = 1,453,749.71/1,279.30
6. Step 6: Final answer
   x = 1,136.36