Finding the Fourth Proportional to 369,672.21, 510,147.69 and 199,906.34

Step by Step Solution

1. Step 1: Write the proportion equation
   369,672.21 : 510,147.69 = 199,906.34 : x
2. Step 2: Convert to fraction form
   369,672.21/510,147.69 = 199,906.34/x
3. Step 3: Cross multiply
   369,672.21x = 510,147.69 × 199,906.34
4. Step 4: Simplify right side
   369,672.21x = 101,981,755,016.62
5. Step 5: Solve for x
   x = 101,981,755,016.62/369,672.21
6. Step 6: Final answer
   x = 275,870.76