Finding the Fourth Proportional to 199,870.72, 275,818.20 and 109,224.72

Step by Step Solution

1. Step 1: Write the proportion equation
   199,870.72 : 275,818.20 = 109,224.72 : x
2. Step 2: Convert to fraction form
   199,870.72/275,818.20 = 109,224.72/x
3. Step 3: Cross multiply
   199,870.72x = 275,818.20 × 109,224.72
4. Step 4: Simplify right side
   199,870.72x = 30,126,165,665.90
5. Step 5: Solve for x
   x = 30,126,165,665.90/199,870.72
6. Step 6: Final answer
   x = 150,728.26