Finding the Fourth Proportional to 258,384.72, 356,552.52 and 145,224.72

Step by Step Solution

1. Step 1: Write the proportion equation
   258,384.72 : 356,552.52 = 145,224.72 : x
2. Step 2: Convert to fraction form
   258,384.72/356,552.52 = 145,224.72/x
3. Step 3: Cross multiply
   258,384.72x = 356,552.52 × 145,224.72
4. Step 4: Simplify right side
   258,384.72x = 51,780,239,882.29
5. Step 5: Solve for x
   x = 51,780,239,882.29/258,384.72
6. Step 6: Final answer
   x = 200,399.78