Finding the Fourth Proportional to 409,728.72, 565,224.69 and 273,796.05

Step by Step Solution

1. Step 1: Write the proportion equation
   409,728.72 : 565,224.69 = 273,796.05 : x
2. Step 2: Convert to fraction form
   409,728.72/565,224.69 = 273,796.05/x
3. Step 3: Cross multiply
   409,728.72x = 565,224.69 × 273,796.05
4. Step 4: Simplify right side
   409,728.72x = 154,756,287,484.48
5. Step 5: Solve for x
   x = 154,756,287,484.48/409,728.72
6. Step 6: Final answer
   x = 377,704.27