Finding the Fourth Proportional to 1,119,200.30, 1,679,456.55 and 409,300.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,119,200.30 : 1,679,456.55 = 409,300.10 : x
2. Step 2: Convert to fraction form
   1,119,200.30/1,679,456.55 = 409,300.10/x
3. Step 3: Cross multiply
   1,119,200.30x = 1,679,456.55 × 409,300.10
4. Step 4: Simplify right side
   1,119,200.30x = 687,401,733,860.66
5. Step 5: Solve for x
   x = 687,401,733,860.66/1,119,200.30
6. Step 6: Final answer
   x = 614,190.09