Finding the Fourth Proportional to 451,222.29, 622,453.62 and 305,978.88

Step by Step Solution

1. Step 1: Write the proportion equation
   451,222.29 : 622,453.62 = 305,978.88 : x
2. Step 2: Convert to fraction form
   451,222.29/622,453.62 = 305,978.88/x
3. Step 3: Cross multiply
   451,222.29x = 622,453.62 × 305,978.88
4. Step 4: Simplify right side
   451,222.29x = 190,457,661,499.55
5. Step 5: Solve for x
   x = 190,457,661,499.55/451,222.29
6. Step 6: Final answer
   x = 422,092.76