Finding the Fourth Proportional to 397,185.55, 548,113.83 and 225,136.03

Step by Step Solution

1. Step 1: Write the proportion equation
   397,185.55 : 548,113.83 = 225,136.03 : x
2. Step 2: Convert to fraction form
   397,185.55/548,113.83 = 225,136.03/x
3. Step 3: Cross multiply
   397,185.55x = 548,113.83 × 225,136.03
4. Step 4: Simplify right side
   397,185.55x = 123,400,171,674.30
5. Step 5: Solve for x
   x = 123,400,171,674.30/397,185.55
6. Step 6: Final answer
   x = 310,686.46