Finding the Fourth Proportional to 356,300.56, 491,572.72 and 203,228.76

Step by Step Solution

1. Step 1: Write the proportion equation
   356,300.56 : 491,572.72 = 203,228.76 : x
2. Step 2: Convert to fraction form
   356,300.56/491,572.72 = 203,228.76/x
3. Step 3: Cross multiply
   356,300.56x = 491,572.72 × 203,228.76
4. Step 4: Simplify right side
   356,300.56x = 99,901,714,335.43
5. Step 5: Solve for x
   x = 99,901,714,335.43/356,300.56
6. Step 6: Final answer
   x = 280,386.07