Finding the Fourth Proportional to 451,978.72, 677,967.40 and 185,551.55

Step by Step Solution

1. Step 1: Write the proportion equation
   451,978.72 : 677,967.40 = 185,551.55 : x
2. Step 2: Convert to fraction form
   451,978.72/677,967.40 = 185,551.55/x
3. Step 3: Cross multiply
   451,978.72x = 677,967.40 × 185,551.55
4. Step 4: Simplify right side
   451,978.72x = 125,797,901,919.47
5. Step 5: Solve for x
   x = 125,797,901,919.47/451,978.72
6. Step 6: Final answer
   x = 278,327.05