Finding the Fourth Proportional to 82,117.28, 123,277.92 and 81,738.24

Step by Step Solution

1. Step 1: Write the proportion equation
   82,117.28 : 123,277.92 = 81,738.24 : x
2. Step 2: Convert to fraction form
   82,117.28/123,277.92 = 81,738.24/x
3. Step 3: Cross multiply
   82,117.28x = 123,277.92 × 81,738.24
4. Step 4: Simplify right side
   82,117.28x = 10,076,520,211.66
5. Step 5: Solve for x
   x = 10,076,520,211.66/82,117.28
6. Step 6: Final answer
   x = 122,708.89