Finding the Fourth Proportional to 1,300.74, 1,951.87 and 479.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.74 : 1,951.87 = 479.59 : x
2. Step 2: Convert to fraction form
   1,300.74/1,951.87 = 479.59/x
3. Step 3: Cross multiply
   1,300.74x = 1,951.87 × 479.59
4. Step 4: Simplify right side
   1,300.74x = 936,087.57
5. Step 5: Solve for x
   x = 936,087.57/1,300.74
6. Step 6: Final answer
   x = 719.66