Finding the Fourth Proportional to 360,938.27, 498,088.78 and 199,789.86

Step by Step Solution

1. Step 1: Write the proportion equation
   360,938.27 : 498,088.78 = 199,789.86 : x
2. Step 2: Convert to fraction form
   360,938.27/498,088.78 = 199,789.86/x
3. Step 3: Cross multiply
   360,938.27x = 498,088.78 × 199,789.86
4. Step 4: Simplify right side
   360,938.27x = 99,513,087,623.77
5. Step 5: Solve for x
   x = 99,513,087,623.77/360,938.27
6. Step 6: Final answer
   x = 275,706.67