Finding the Fourth Proportional to 448,086.78, 670,583.61 and 277,238.34

Step by Step Solution

1. Step 1: Write the proportion equation
   448,086.78 : 670,583.61 = 277,238.34 : x
2. Step 2: Convert to fraction form
   448,086.78/670,583.61 = 277,238.34/x
3. Step 3: Cross multiply
   448,086.78x = 670,583.61 × 277,238.34
4. Step 4: Simplify right side
   448,086.78x = 185,911,486,867.61
5. Step 5: Solve for x
   x = 185,911,486,867.61/448,086.78
6. Step 6: Final answer
   x = 414,900.63