Finding the Fourth Proportional to 82,669.92, 123,443.43 and 80,427.90

Step by Step Solution

1. Step 1: Write the proportion equation
   82,669.92 : 123,443.43 = 80,427.90 : x
2. Step 2: Convert to fraction form
   82,669.92/123,443.43 = 80,427.90/x
3. Step 3: Cross multiply
   82,669.92x = 123,443.43 × 80,427.90
4. Step 4: Simplify right side
   82,669.92x = 9,928,296,005.01
5. Step 5: Solve for x
   x = 9,928,296,005.01/82,669.92
6. Step 6: Final answer
   x = 120,095.63