Finding the Fourth Proportional to 82,018.65, 123,027.97 and 19,689.15

Step by Step Solution

1. Step 1: Write the proportion equation
   82,018.65 : 123,027.97 = 19,689.15 : x
2. Step 2: Convert to fraction form
   82,018.65/123,027.97 = 19,689.15/x
3. Step 3: Cross multiply
   82,018.65x = 123,027.97 × 19,689.15
4. Step 4: Simplify right side
   82,018.65x = 2,422,316,155.53
5. Step 5: Solve for x
   x = 2,422,316,155.53/82,018.65
6. Step 6: Final answer
   x = 29,533.72