Finding the Fourth Proportional to 497,315.53, 745,978.47 and 398,106.37

Step by Step Solution

1. Step 1: Write the proportion equation
   497,315.53 : 745,978.47 = 398,106.37 : x
2. Step 2: Convert to fraction form
   497,315.53/745,978.47 = 398,106.37/x
3. Step 3: Cross multiply
   497,315.53x = 745,978.47 × 398,106.37
4. Step 4: Simplify right side
   497,315.53x = 296,978,780,789.85
5. Step 5: Solve for x
   x = 296,978,780,789.85/497,315.53
6. Step 6: Final answer
   x = 597,163.70