Finding the Fourth Proportional to 82,538.41, 123,878.31 and 81,917.14

Step by Step Solution

1. Step 1: Write the proportion equation
   82,538.41 : 123,878.31 = 81,917.14 : x
2. Step 2: Convert to fraction form
   82,538.41/123,878.31 = 81,917.14/x
3. Step 3: Cross multiply
   82,538.41x = 123,878.31 × 81,917.14
4. Step 4: Simplify right side
   82,538.41x = 10,147,756,863.23
5. Step 5: Solve for x
   x = 10,147,756,863.23/82,538.41
6. Step 6: Final answer
   x = 122,945.87