Finding the Fourth Proportional to 674,022.72, 1,010,535.12 and 318,621.72

Step by Step Solution

1. Step 1: Write the proportion equation
   674,022.72 : 1,010,535.12 = 318,621.72 : x
2. Step 2: Convert to fraction form
   674,022.72/1,010,535.12 = 318,621.72/x
3. Step 3: Cross multiply
   674,022.72x = 1,010,535.12 × 318,621.72
4. Step 4: Simplify right side
   674,022.72x = 321,978,438,054.81
5. Step 5: Solve for x
   x = 321,978,438,054.81/674,022.72
6. Step 6: Final answer
   x = 477,696.71