Finding the Fourth Proportional to 356,109.32, 491,458.14 and 203,150.89

Step by Step Solution

1. Step 1: Write the proportion equation
   356,109.32 : 491,458.14 = 203,150.89 : x
2. Step 2: Convert to fraction form
   356,109.32/491,458.14 = 203,150.89/x
3. Step 3: Cross multiply
   356,109.32x = 491,458.14 × 203,150.89
4. Step 4: Simplify right side
   356,109.32x = 99,840,156,081.45
5. Step 5: Solve for x
   x = 99,840,156,081.45/356,109.32
6. Step 6: Final answer
   x = 280,363.78