Finding the Fourth Proportional to 738.01, 1,019.56 and 486.55

Step by Step Solution

1. Step 1: Write the proportion equation
   738.01 : 1,019.56 = 486.55 : x
2. Step 2: Convert to fraction form
   738.01/1,019.56 = 486.55/x
3. Step 3: Cross multiply
   738.01x = 1,019.56 × 486.55
4. Step 4: Simplify right side
   738.01x = 496,061.82
5. Step 5: Solve for x
   x = 496,061.82/738.01
6. Step 6: Final answer
   x = 672.17