Finding the Fourth Proportional to 2,099,678.28, 2,897,556.72 and 1,228,680.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099,678.28 : 2,897,556.72 = 1,228,680.42 : x
2. Step 2: Convert to fraction form
   2,099,678.28/2,897,556.72 = 1,228,680.42/x
3. Step 3: Cross multiply
   2,099,678.28x = 2,897,556.72 × 1,228,680.42
4. Step 4: Simplify right side
   2,099,678.28x = 3,560,171,207,703.42
5. Step 5: Solve for x
   x = 3,560,171,207,703.42/2,099,678.28
6. Step 6: Final answer
   x = 1,695,579.39