Finding the Fourth Proportional to 82,580.81, 123,879.41 and 26,406.80

Step by Step Solution

1. Step 1: Write the proportion equation
   82,580.81 : 123,879.41 = 26,406.80 : x
2. Step 2: Convert to fraction form
   82,580.81/123,879.41 = 26,406.80/x
3. Step 3: Cross multiply
   82,580.81x = 123,879.41 × 26,406.80
4. Step 4: Simplify right side
   82,580.81x = 3,271,258,052.56
5. Step 5: Solve for x
   x = 3,271,258,052.56/82,580.81
6. Step 6: Final answer
   x = 39,612.81