Finding the Fourth Proportional to 82,647.18, 123,973.11 and 20,317.50

Step by Step Solution

1. Step 1: Write the proportion equation
   82,647.18 : 123,973.11 = 20,317.50 : x
2. Step 2: Convert to fraction form
   82,647.18/123,973.11 = 20,317.50/x
3. Step 3: Cross multiply
   82,647.18x = 123,973.11 × 20,317.50
4. Step 4: Simplify right side
   82,647.18x = 2,518,823,662.43
5. Step 5: Solve for x
   x = 2,518,823,662.43/82,647.18
6. Step 6: Final answer
   x = 30,476.83