Finding the Fourth Proportional to 709,377.54, 978,962.72 and 403,498.05

Step by Step Solution

1. Step 1: Write the proportion equation
   709,377.54 : 978,962.72 = 403,498.05 : x
2. Step 2: Convert to fraction form
   709,377.54/978,962.72 = 403,498.05/x
3. Step 3: Cross multiply
   709,377.54x = 978,962.72 × 403,498.05
4. Step 4: Simplify right side
   709,377.54x = 395,009,548,542.70
5. Step 5: Solve for x
   x = 395,009,548,542.70/709,377.54
6. Step 6: Final answer
   x = 556,839.66