Finding the Fourth Proportional to 82,651.18, 123,979.11 and 20,321.50

Step by Step Solution

1. Step 1: Write the proportion equation
   82,651.18 : 123,979.11 = 20,321.50 : x
2. Step 2: Convert to fraction form
   82,651.18/123,979.11 = 20,321.50/x
3. Step 3: Cross multiply
   82,651.18x = 123,979.11 × 20,321.50
4. Step 4: Simplify right side
   82,651.18x = 2,519,441,483.87
5. Step 5: Solve for x
   x = 2,519,441,483.87/82,651.18
6. Step 6: Final answer
   x = 30,482.83