Finding the Fourth Proportional to 86,031.86, 128,998.17 and 33,379.83

Step by Step Solution

1. Step 1: Write the proportion equation
   86,031.86 : 128,998.17 = 33,379.83 : x
2. Step 2: Convert to fraction form
   86,031.86/128,998.17 = 33,379.83/x
3. Step 3: Cross multiply
   86,031.86x = 128,998.17 × 33,379.83
4. Step 4: Simplify right side
   86,031.86x = 4,305,936,984.91
5. Step 5: Solve for x
   x = 4,305,936,984.91/86,031.86
6. Step 6: Final answer
   x = 50,050.50