Finding the Fourth Proportional to 510,123.61, 764,520.81 and 317,919.12

Step by Step Solution

1. Step 1: Write the proportion equation
   510,123.61 : 764,520.81 = 317,919.12 : x
2. Step 2: Convert to fraction form
   510,123.61/764,520.81 = 317,919.12/x
3. Step 3: Cross multiply
   510,123.61x = 764,520.81 × 317,919.12
4. Step 4: Simplify right side
   510,123.61x = 243,055,783,136.89
5. Step 5: Solve for x
   x = 243,055,783,136.89/510,123.61
6. Step 6: Final answer
   x = 476,464.49