Finding the Fourth Proportional to 673,978.02, 1,010,467.62 and 318,576.72

Step by Step Solution

1. Step 1: Write the proportion equation
   673,978.02 : 1,010,467.62 = 318,576.72 : x
2. Step 2: Convert to fraction form
   673,978.02/1,010,467.62 = 318,576.72/x
3. Step 3: Cross multiply
   673,978.02x = 1,010,467.62 × 318,576.72
4. Step 4: Simplify right side
   673,978.02x = 321,911,460,045.81
5. Step 5: Solve for x
   x = 321,911,460,045.81/673,978.02
6. Step 6: Final answer
   x = 477,629.02