Finding the Fourth Proportional to 455,012.56, 682,227.20 and 188,956.72

Step by Step Solution

1. Step 1: Write the proportion equation
   455,012.56 : 682,227.20 = 188,956.72 : x
2. Step 2: Convert to fraction form
   455,012.56/682,227.20 = 188,956.72/x
3. Step 3: Cross multiply
   455,012.56x = 682,227.20 × 188,956.72
4. Step 4: Simplify right side
   455,012.56x = 128,911,414,006.78
5. Step 5: Solve for x
   x = 128,911,414,006.78/455,012.56
6. Step 6: Final answer
   x = 283,313.97