Finding the Fourth Proportional to 250,670.72, 345,903.72 and 143,219.36

Step by Step Solution

1. Step 1: Write the proportion equation
   250,670.72 : 345,903.72 = 143,219.36 : x
2. Step 2: Convert to fraction form
   250,670.72/345,903.72 = 143,219.36/x
3. Step 3: Cross multiply
   250,670.72x = 345,903.72 × 143,219.36
4. Step 4: Simplify right side
   250,670.72x = 49,540,109,400.02
5. Step 5: Solve for x
   x = 49,540,109,400.02/250,670.72
6. Step 6: Final answer
   x = 197,630.22