Finding the Fourth Proportional to 717,801.82, 990,610.72 and 395,511.83

Step by Step Solution

1. Step 1: Write the proportion equation
   717,801.82 : 990,610.72 = 395,511.83 : x
2. Step 2: Convert to fraction form
   717,801.82/990,610.72 = 395,511.83/x
3. Step 3: Cross multiply
   717,801.82x = 990,610.72 × 395,511.83
4. Step 4: Simplify right side
   717,801.82x = 391,798,256,457.78
5. Step 5: Solve for x
   x = 391,798,256,457.78/717,801.82
6. Step 6: Final answer
   x = 545,830.68