Finding the Fourth Proportional to 685,498.22, 946,094.33 and 391,148.53

Step by Step Solution

1. Step 1: Write the proportion equation
   685,498.22 : 946,094.33 = 391,148.53 : x
2. Step 2: Convert to fraction form
   685,498.22/946,094.33 = 391,148.53/x
3. Step 3: Cross multiply
   685,498.22x = 946,094.33 × 391,148.53
4. Step 4: Simplify right side
   685,498.22x = 370,063,399,734.62
5. Step 5: Solve for x
   x = 370,063,399,734.62/685,498.22
6. Step 6: Final answer
   x = 539,845.89