Finding the Fourth Proportional to 82,111.70, 123,167.55 and 19,782.20

Step by Step Solution

1. Step 1: Write the proportion equation
   82,111.70 : 123,167.55 = 19,782.20 : x
2. Step 2: Convert to fraction form
   82,111.70/123,167.55 = 19,782.20/x
3. Step 3: Cross multiply
   82,111.70x = 123,167.55 × 19,782.20
4. Step 4: Simplify right side
   82,111.70x = 2,436,525,107.61
5. Step 5: Solve for x
   x = 2,436,525,107.61/82,111.70
6. Step 6: Final answer
   x = 29,673.30