Finding the Fourth Proportional to 219,744.72, 303,259.32 and 139,142.88

Step by Step Solution

1. Step 1: Write the proportion equation
   219,744.72 : 303,259.32 = 139,142.88 : x
2. Step 2: Convert to fraction form
   219,744.72/303,259.32 = 139,142.88/x
3. Step 3: Cross multiply
   219,744.72x = 303,259.32 × 139,142.88
4. Step 4: Simplify right side
   219,744.72x = 42,196,375,171.64
5. Step 5: Solve for x
   x = 42,196,375,171.64/219,744.72
6. Step 6: Final answer
   x = 192,024.52