Finding the Fourth Proportional to 811,007.36, 1,119,142.06 and 448,402.76

Step by Step Solution

1. Step 1: Write the proportion equation
   811,007.36 : 1,119,142.06 = 448,402.76 : x
2. Step 2: Convert to fraction form
   811,007.36/1,119,142.06 = 448,402.76/x
3. Step 3: Cross multiply
   811,007.36x = 1,119,142.06 × 448,402.76
4. Step 4: Simplify right side
   811,007.36x = 501,826,381,819.37
5. Step 5: Solve for x
   x = 501,826,381,819.37/811,007.36
6. Step 6: Final answer
   x = 618,769.21