Finding the Fourth Proportional to 83,739.45, 115,222.80 and 81,746.55

Step by Step Solution

1. Step 1: Write the proportion equation
   83,739.45 : 115,222.80 = 81,746.55 : x
2. Step 2: Convert to fraction form
   83,739.45/115,222.80 = 81,746.55/x
3. Step 3: Cross multiply
   83,739.45x = 115,222.80 × 81,746.55
4. Step 4: Simplify right side
   83,739.45x = 9,419,066,687.89
5. Step 5: Solve for x
   x = 9,419,066,687.89/83,739.45
6. Step 6: Final answer
   x = 112,480.63