Finding the Fourth Proportional to 1,309,401.28, 1,964,581.70 and 551,433.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,309,401.28 : 1,964,581.70 = 551,433.57 : x
2. Step 2: Convert to fraction form
   1,309,401.28/1,964,581.70 = 551,433.57/x
3. Step 3: Cross multiply
   1,309,401.28x = 1,964,581.70 × 551,433.57
4. Step 4: Simplify right side
   1,309,401.28x = 1,083,336,300,387.67
5. Step 5: Solve for x
   x = 1,083,336,300,387.67/1,309,401.28
6. Step 6: Final answer
   x = 827,352.41