Finding the Fourth Proportional to 82,768.50, 123,857.37 and 71,713.08

Step by Step Solution

1. Step 1: Write the proportion equation
   82,768.50 : 123,857.37 = 71,713.08 : x
2. Step 2: Convert to fraction form
   82,768.50/123,857.37 = 71,713.08/x
3. Step 3: Cross multiply
   82,768.50x = 123,857.37 × 71,713.08
4. Step 4: Simplify right side
   82,768.50x = 8,882,193,483.40
5. Step 5: Solve for x
   x = 8,882,193,483.40/82,768.50
6. Step 6: Final answer
   x = 107,313.69