Finding the Fourth Proportional to 395,196.76, 545,222.66 and 259,305.72

Step by Step Solution

1. Step 1: Write the proportion equation
   395,196.76 : 545,222.66 = 259,305.72 : x
2. Step 2: Convert to fraction form
   395,196.76/545,222.66 = 259,305.72/x
3. Step 3: Cross multiply
   395,196.76x = 545,222.66 × 259,305.72
4. Step 4: Simplify right side
   395,196.76x = 141,379,354,411.62
5. Step 5: Solve for x
   x = 141,379,354,411.62/395,196.76
6. Step 6: Final answer
   x = 357,744.21