Finding the Fourth Proportional to 493,061.58, 680,413.86 and 278,196.12

Step by Step Solution

1. Step 1: Write the proportion equation
   493,061.58 : 680,413.86 = 278,196.12 : x
2. Step 2: Convert to fraction form
   493,061.58/680,413.86 = 278,196.12/x
3. Step 3: Cross multiply
   493,061.58x = 680,413.86 × 278,196.12
4. Step 4: Simplify right side
   493,061.58x = 189,288,495,846.22
5. Step 5: Solve for x
   x = 189,288,495,846.22/493,061.58
6. Step 6: Final answer
   x = 383,904.37