Finding the Fourth Proportional to 500,072.72, 690,099.96 and 273,718

Step by Step Solution

1. Step 1: Write the proportion equation
   500,072.72 : 690,099.96 = 273,718 : x
2. Step 2: Convert to fraction form
   500,072.72/690,099.96 = 273,718/x
3. Step 3: Cross multiply
   500,072.72x = 690,099.96 × 273,718
4. Step 4: Simplify right side
   500,072.72x = 188,892,780,851.28
5. Step 5: Solve for x
   x = 188,892,780,851.28/500,072.72
6. Step 6: Final answer
   x = 377,730.62