Finding the Fourth Proportional to 2,809,993.28, 4,215,059.20 and 916,934.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,809,993.28 : 4,215,059.20 = 916,934.72 : x
2. Step 2: Convert to fraction form
   2,809,993.28/4,215,059.20 = 916,934.72/x
3. Step 3: Cross multiply
   2,809,993.28x = 4,215,059.20 × 916,934.72
4. Step 4: Simplify right side
   2,809,993.28x = 3,864,934,127,335.42
5. Step 5: Solve for x
   x = 3,864,934,127,335.42/2,809,993.28
6. Step 6: Final answer
   x = 1,375,424.69