Finding the Fourth Proportional to 86,282.10, 128,511.59 and 82,443.06

Step by Step Solution

1. Step 1: Write the proportion equation
   86,282.10 : 128,511.59 = 82,443.06 : x
2. Step 2: Convert to fraction form
   86,282.10/128,511.59 = 82,443.06/x
3. Step 3: Cross multiply
   86,282.10x = 128,511.59 × 82,443.06
4. Step 4: Simplify right side
   86,282.10x = 10,594,888,312.85
5. Step 5: Solve for x
   x = 10,594,888,312.85/86,282.10
6. Step 6: Final answer
   x = 122,793.58