Finding the Fourth Proportional to 580,172.78, 800,673.72 and 386,245.82

Step by Step Solution

1. Step 1: Write the proportion equation
   580,172.78 : 800,673.72 = 386,245.82 : x
2. Step 2: Convert to fraction form
   580,172.78/800,673.72 = 386,245.82/x
3. Step 3: Cross multiply
   580,172.78x = 800,673.72 × 386,245.82
4. Step 4: Simplify right side
   580,172.78x = 309,256,877,533.85
5. Step 5: Solve for x
   x = 309,256,877,533.85/580,172.78
6. Step 6: Final answer
   x = 533,042.72