Finding the Fourth Proportional to 82,306.78, 123,459.27 and 19,977.28

Step by Step Solution

1. Step 1: Write the proportion equation
   82,306.78 : 123,459.27 = 19,977.28 : x
2. Step 2: Convert to fraction form
   82,306.78/123,459.27 = 19,977.28/x
3. Step 3: Cross multiply
   82,306.78x = 123,459.27 × 19,977.28
4. Step 4: Simplify right side
   82,306.78x = 2,466,380,405.39
5. Step 5: Solve for x
   x = 2,466,380,405.39/82,306.78
6. Step 6: Final answer
   x = 29,965.70