Finding the Fourth Proportional to 263,796.98, 395,780.22 and 86,263.61

Step by Step Solution

1. Step 1: Write the proportion equation
   263,796.98 : 395,780.22 = 86,263.61 : x
2. Step 2: Convert to fraction form
   263,796.98/395,780.22 = 86,263.61/x
3. Step 3: Cross multiply
   263,796.98x = 395,780.22 × 86,263.61
4. Step 4: Simplify right side
   263,796.98x = 34,141,428,564.89
5. Step 5: Solve for x
   x = 34,141,428,564.89/263,796.98
6. Step 6: Final answer
   x = 129,423.12