Finding the Fourth Proportional to 406,049.15, 609,105.17 and 136,178.82

Step by Step Solution

1. Step 1: Write the proportion equation
   406,049.15 : 609,105.17 = 136,178.82 : x
2. Step 2: Convert to fraction form
   406,049.15/609,105.17 = 136,178.82/x
3. Step 3: Cross multiply
   406,049.15x = 609,105.17 × 136,178.82
4. Step 4: Simplify right side
   406,049.15x = 82,947,222,880.94
5. Step 5: Solve for x
   x = 82,947,222,880.94/406,049.15
6. Step 6: Final answer
   x = 204,278.77