Finding the Fourth Proportional to 709,017.48, 978,456.24 and 403,086.96

Step by Step Solution

1. Step 1: Write the proportion equation
   709,017.48 : 978,456.24 = 403,086.96 : x
2. Step 2: Convert to fraction form
   709,017.48/978,456.24 = 403,086.96/x
3. Step 3: Cross multiply
   709,017.48x = 978,456.24 × 403,086.96
4. Step 4: Simplify right side
   709,017.48x = 394,402,951,274.63
5. Step 5: Solve for x
   x = 394,402,951,274.63/709,017.48
6. Step 6: Final answer
   x = 556,266.89