Finding the Fourth Proportional to 199,856.16, 275,796.72 and 109,212.30

Step by Step Solution

1. Step 1: Write the proportion equation
   199,856.16 : 275,796.72 = 109,212.30 : x
2. Step 2: Convert to fraction form
   199,856.16/275,796.72 = 109,212.30/x
3. Step 3: Cross multiply
   199,856.16x = 275,796.72 × 109,212.30
4. Step 4: Simplify right side
   199,856.16x = 30,120,394,123.66
5. Step 5: Solve for x
   x = 30,120,394,123.66/199,856.16
6. Step 6: Final answer
   x = 150,710.36