Finding the Fourth Proportional to 2,663,576.56, 3,995,401.68 and 866,469.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663,576.56 : 3,995,401.68 = 866,469.28 : x
2. Step 2: Convert to fraction form
   2,663,576.56/3,995,401.68 = 866,469.28/x
3. Step 3: Cross multiply
   2,663,576.56x = 3,995,401.68 × 866,469.28
4. Step 4: Simplify right side
   2,663,576.56x = 3,461,892,816,980.39
5. Step 5: Solve for x
   x = 3,461,892,816,980.39/2,663,576.56
6. Step 6: Final answer
   x = 1,299,715.90