Finding the Fourth Proportional to 713,978.82, 985,228.02 and 407,994.48

Step by Step Solution

1. Step 1: Write the proportion equation
   713,978.82 : 985,228.02 = 407,994.48 : x
2. Step 2: Convert to fraction form
   713,978.82/985,228.02 = 407,994.48/x
3. Step 3: Cross multiply
   713,978.82x = 985,228.02 × 407,994.48
4. Step 4: Simplify right side
   713,978.82x = 401,967,593,701.33
5. Step 5: Solve for x
   x = 401,967,593,701.33/713,978.82
6. Step 6: Final answer
   x = 562,996.52