Finding the Fourth Proportional to 82,644.52, 123,965.68 and 20,315.56

Step by Step Solution

1. Step 1: Write the proportion equation
   82,644.52 : 123,965.68 = 20,315.56 : x
2. Step 2: Convert to fraction form
   82,644.52/123,965.68 = 20,315.56/x
3. Step 3: Cross multiply
   82,644.52x = 123,965.68 × 20,315.56
4. Step 4: Simplify right side
   82,644.52x = 2,518,432,209.98
5. Step 5: Solve for x
   x = 2,518,432,209.98/82,644.52
6. Step 6: Final answer
   x = 30,473.07