Finding the Fourth Proportional to 86,009, 128,980.36 and 33,411.56

Step by Step Solution

1. Step 1: Write the proportion equation
   86,009 : 128,980.36 = 33,411.56 : x
2. Step 2: Convert to fraction form
   86,009/128,980.36 = 33,411.56/x
3. Step 3: Cross multiply
   86,009x = 128,980.36 × 33,411.56
4. Step 4: Simplify right side
   86,009x = 4,309,435,036.96
5. Step 5: Solve for x
   x = 4,309,435,036.96/86,009
6. Step 6: Final answer
   x = 50,104.47