Finding the Fourth Proportional to 738,152.17, 1,018,650 and 398,620.42

Step by Step Solution

1. Step 1: Write the proportion equation
   738,152.17 : 1,018,650 = 398,620.42 : x
2. Step 2: Convert to fraction form
   738,152.17/1,018,650 = 398,620.42/x
3. Step 3: Cross multiply
   738,152.17x = 1,018,650 × 398,620.42
4. Step 4: Simplify right side
   738,152.17x = 406,054,690,833
5. Step 5: Solve for x
   x = 406,054,690,833/738,152.17
6. Step 6: Final answer
   x = 550,096.18