Finding the Fourth Proportional to 494,100.72, 681,608.52 and 312,506.82

Step by Step Solution

1. Step 1: Write the proportion equation
   494,100.72 : 681,608.52 = 312,506.82 : x
2. Step 2: Convert to fraction form
   494,100.72/681,608.52 = 312,506.82/x
3. Step 3: Cross multiply
   494,100.72x = 681,608.52 × 312,506.82
4. Step 4: Simplify right side
   494,100.72x = 213,007,311,070.11
5. Step 5: Solve for x
   x = 213,007,311,070.11/494,100.72
6. Step 6: Final answer
   x = 431,100.99