Finding the Fourth Proportional to 82,128.06, 122,608.76 and 79,212.06

Step by Step Solution

1. Step 1: Write the proportion equation
   82,128.06 : 122,608.76 = 79,212.06 : x
2. Step 2: Convert to fraction form
   82,128.06/122,608.76 = 79,212.06/x
3. Step 3: Cross multiply
   82,128.06x = 122,608.76 × 79,212.06
4. Step 4: Simplify right side
   82,128.06x = 9,712,092,057.59
5. Step 5: Solve for x
   x = 9,712,092,057.59/82,128.06
6. Step 6: Final answer
   x = 118,255.47