Finding the Fourth Proportional to 738,150.42, 1,018,647.59 and 398,618.67

Step by Step Solution

1. Step 1: Write the proportion equation
   738,150.42 : 1,018,647.59 = 398,618.67 : x
2. Step 2: Convert to fraction form
   738,150.42/1,018,647.59 = 398,618.67/x
3. Step 3: Cross multiply
   738,150.42x = 1,018,647.59 × 398,618.67
4. Step 4: Simplify right side
   738,150.42x = 406,051,945,531.41
5. Step 5: Solve for x
   x = 406,051,945,531.41/738,150.42
6. Step 6: Final answer
   x = 550,093.77