Finding the Fourth Proportional to 712,162, 982,783.56 and 394,210

Step by Step Solution

1. Step 1: Write the proportion equation
   712,162 : 982,783.56 = 394,210 : x
2. Step 2: Convert to fraction form
   712,162/982,783.56 = 394,210/x
3. Step 3: Cross multiply
   712,162x = 982,783.56 × 394,210
4. Step 4: Simplify right side
   712,162x = 387,423,107,187.60
5. Step 5: Solve for x
   x = 387,423,107,187.60/712,162
6. Step 6: Final answer
   x = 544,009.80