Finding the Fourth Proportional to 83,108.21, 124,662.27 and 20,778.71

Step by Step Solution

1. Step 1: Write the proportion equation
   83,108.21 : 124,662.27 = 20,778.71 : x
2. Step 2: Convert to fraction form
   83,108.21/124,662.27 = 20,778.71/x
3. Step 3: Cross multiply
   83,108.21x = 124,662.27 × 20,778.71
4. Step 4: Simplify right side
   83,108.21x = 2,590,321,156.27
5. Step 5: Solve for x
   x = 2,590,321,156.27/83,108.21
6. Step 6: Final answer
   x = 31,168.05