Finding the Fourth Proportional to 82,415.30, 123,882.15 and 80,860.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,415.30 : 123,882.15 = 80,860.10 : x
2. Step 2: Convert to fraction form
   82,415.30/123,882.15 = 80,860.10/x
3. Step 3: Cross multiply
   82,415.30x = 123,882.15 × 80,860.10
4. Step 4: Simplify right side
   82,415.30x = 10,017,123,037.22
5. Step 5: Solve for x
   x = 10,017,123,037.22/82,415.30
6. Step 6: Final answer
   x = 121,544.46