Finding the Fourth Proportional to 360,910.76, 498,061.26 and 199,780.83

Step by Step Solution

1. Step 1: Write the proportion equation
   360,910.76 : 498,061.26 = 199,780.83 : x
2. Step 2: Convert to fraction form
   360,910.76/498,061.26 = 199,780.83/x
3. Step 3: Cross multiply
   360,910.76x = 498,061.26 × 199,780.83
4. Step 4: Simplify right side
   360,910.76x = 99,503,091,913.65
5. Step 5: Solve for x
   x = 99,503,091,913.65/360,910.76
6. Step 6: Final answer
   x = 275,699.99