Finding the Fourth Proportional to 778,748.52, 1,074,671.46 and 439,215.72

Step by Step Solution

1. Step 1: Write the proportion equation
   778,748.52 : 1,074,671.46 = 439,215.72 : x
2. Step 2: Convert to fraction form
   778,748.52/1,074,671.46 = 439,215.72/x
3. Step 3: Cross multiply
   778,748.52x = 1,074,671.46 × 439,215.72
4. Step 4: Simplify right side
   778,748.52x = 472,012,599,067.35
5. Step 5: Solve for x
   x = 472,012,599,067.35/778,748.52
6. Step 6: Final answer
   x = 606,116.85