Finding the Fourth Proportional to 276,404.10, 381,406.37 and 155,542.79

Step by Step Solution

1. Step 1: Write the proportion equation
   276,404.10 : 381,406.37 = 155,542.79 : x
2. Step 2: Convert to fraction form
   276,404.10/381,406.37 = 155,542.79/x
3. Step 3: Cross multiply
   276,404.10x = 381,406.37 × 155,542.79
4. Step 4: Simplify right side
   276,404.10x = 59,325,008,228.83
5. Step 5: Solve for x
   x = 59,325,008,228.83/276,404.10
6. Step 6: Final answer
   x = 214,631.43