Finding the Fourth Proportional to 451,443.61, 622,978.70 and 247,487.56

Step by Step Solution

1. Step 1: Write the proportion equation
   451,443.61 : 622,978.70 = 247,487.56 : x
2. Step 2: Convert to fraction form
   451,443.61/622,978.70 = 247,487.56/x
3. Step 3: Cross multiply
   451,443.61x = 622,978.70 × 247,487.56
4. Step 4: Simplify right side
   451,443.61x = 154,179,481,192.52
5. Step 5: Solve for x
   x = 154,179,481,192.52/451,443.61
6. Step 6: Final answer
   x = 341,525.45