Finding the Fourth Proportional to 82,743.92, 123,239.52 and 82,340.72

Step by Step Solution

1. Step 1: Write the proportion equation
   82,743.92 : 123,239.52 = 82,340.72 : x
2. Step 2: Convert to fraction form
   82,743.92/123,239.52 = 82,340.72/x
3. Step 3: Cross multiply
   82,743.92x = 123,239.52 × 82,340.72
4. Step 4: Simplify right side
   82,743.92x = 10,147,630,809.25
5. Step 5: Solve for x
   x = 10,147,630,809.25/82,743.92
6. Step 6: Final answer
   x = 122,638.99