Finding the Fourth Proportional to 1,279.06, 1,915.17 and 730.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.06 : 1,915.17 = 730.49 : x
2. Step 2: Convert to fraction form
   1,279.06/1,915.17 = 730.49/x
3. Step 3: Cross multiply
   1,279.06x = 1,915.17 × 730.49
4. Step 4: Simplify right side
   1,279.06x = 1,399,002.96
5. Step 5: Solve for x
   x = 1,399,002.96/1,279.06
6. Step 6: Final answer
   x = 1,093.78