Finding the Fourth Proportional to 811,499.42, 1,119,902.18 and 448,917.03

Step by Step Solution

1. Step 1: Write the proportion equation
   811,499.42 : 1,119,902.18 = 448,917.03 : x
2. Step 2: Convert to fraction form
   811,499.42/1,119,902.18 = 448,917.03/x
3. Step 3: Cross multiply
   811,499.42x = 1,119,902.18 × 448,917.03
4. Step 4: Simplify right side
   811,499.42x = 502,743,158,291.54
5. Step 5: Solve for x
   x = 502,743,158,291.54/811,499.42
6. Step 6: Final answer
   x = 619,523.74