Finding the Fourth Proportional to 2,279,148.62, 3,418,728.72 and 931,311

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279,148.62 : 3,418,728.72 = 931,311 : x
2. Step 2: Convert to fraction form
   2,279,148.62/3,418,728.72 = 931,311/x
3. Step 3: Cross multiply
   2,279,148.62x = 3,418,728.72 × 931,311
4. Step 4: Simplify right side
   2,279,148.62x = 3,183,899,662,951.92
5. Step 5: Solve for x
   x = 3,183,899,662,951.92/2,279,148.62
6. Step 6: Final answer
   x = 1,396,968.87