Finding the Fourth Proportional to 400,648.12, 601,019.61 and 250,900.77

Step by Step Solution

1. Step 1: Write the proportion equation
   400,648.12 : 601,019.61 = 250,900.77 : x
2. Step 2: Convert to fraction form
   400,648.12/601,019.61 = 250,900.77/x
3. Step 3: Cross multiply
   400,648.12x = 601,019.61 × 250,900.77
4. Step 4: Simplify right side
   400,648.12x = 150,796,282,934.10
5. Step 5: Solve for x
   x = 150,796,282,934.10/400,648.12
6. Step 6: Final answer
   x = 376,380.86