Finding the Fourth Proportional to 276,357.20, 381,372.22 and 155,498.72

Step by Step Solution

1. Step 1: Write the proportion equation
   276,357.20 : 381,372.22 = 155,498.72 : x
2. Step 2: Convert to fraction form
   276,357.20/381,372.22 = 155,498.72/x
3. Step 3: Cross multiply
   276,357.20x = 381,372.22 × 155,498.72
4. Step 4: Simplify right side
   276,357.20x = 59,302,892,053.56
5. Step 5: Solve for x
   x = 59,302,892,053.56/276,357.20
6. Step 6: Final answer
   x = 214,587.83