Finding the Fourth Proportional to 326,968, 487,590.72 and 323,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   326,968 : 487,590.72 = 323,978.56 : x
2. Step 2: Convert to fraction form
   326,968/487,590.72 = 323,978.56/x
3. Step 3: Cross multiply
   326,968x = 487,590.72 × 323,978.56
4. Step 4: Simplify right side
   326,968x = 157,968,939,334.96
5. Step 5: Solve for x
   x = 157,968,939,334.96/326,968
6. Step 6: Final answer
   x = 483,132.72