Finding the Fourth Proportional to 738,156.83, 1,018,656.41 and 398,625.05

Step by Step Solution

1. Step 1: Write the proportion equation
   738,156.83 : 1,018,656.41 = 398,625.05 : x
2. Step 2: Convert to fraction form
   738,156.83/1,018,656.41 = 398,625.05/x
3. Step 3: Cross multiply
   738,156.83x = 1,018,656.41 × 398,625.05
4. Step 4: Simplify right side
   738,156.83x = 406,061,962,369.07
5. Step 5: Solve for x
   x = 406,061,962,369.07/738,156.83
6. Step 6: Final answer
   x = 550,102.56