Finding the Fourth Proportional to 82,018.89, 123,028.34 and 19,689.39

Step by Step Solution

1. Step 1: Write the proportion equation
   82,018.89 : 123,028.34 = 19,689.39 : x
2. Step 2: Convert to fraction form
   82,018.89/123,028.34 = 19,689.39/x
3. Step 3: Cross multiply
   82,018.89x = 123,028.34 × 19,689.39
4. Step 4: Simplify right side
   82,018.89x = 2,422,352,967.31
5. Step 5: Solve for x
   x = 2,422,352,967.31/82,018.89
6. Step 6: Final answer
   x = 29,534.09