Finding the Fourth Proportional to 82,167.27, 122,656.55 and 72,202.78

Step by Step Solution

1. Step 1: Write the proportion equation
   82,167.27 : 122,656.55 = 72,202.78 : x
2. Step 2: Convert to fraction form
   82,167.27/122,656.55 = 72,202.78/x
3. Step 3: Cross multiply
   82,167.27x = 122,656.55 × 72,202.78
4. Step 4: Simplify right side
   82,167.27x = 8,856,143,895.21
5. Step 5: Solve for x
   x = 8,856,143,895.21/82,167.27
6. Step 6: Final answer
   x = 107,781.89