Finding the Fourth Proportional to 404,543.79, 606,936.42 and 120,243.78

Step by Step Solution

1. Step 1: Write the proportion equation
   404,543.79 : 606,936.42 = 120,243.78 : x
2. Step 2: Convert to fraction form
   404,543.79/606,936.42 = 120,243.78/x
3. Step 3: Cross multiply
   404,543.79x = 606,936.42 × 120,243.78
4. Step 4: Simplify right side
   404,543.79x = 72,980,329,360.47
5. Step 5: Solve for x
   x = 72,980,329,360.47/404,543.79
6. Step 6: Final answer
   x = 180,401.56