Finding the Fourth Proportional to 345,100.92, 517,737.32 and 274,290.72

Step by Step Solution

1. Step 1: Write the proportion equation
   345,100.92 : 517,737.32 = 274,290.72 : x
2. Step 2: Convert to fraction form
   345,100.92/517,737.32 = 274,290.72/x
3. Step 3: Cross multiply
   345,100.92x = 517,737.32 × 274,290.72
4. Step 4: Simplify right side
   345,100.92x = 142,010,542,273.67
5. Step 5: Solve for x
   x = 142,010,542,273.67/345,100.92
6. Step 6: Final answer
   x = 411,504.39