Finding the Fourth Proportional to 82,215.87, 123,323.88 and 19,886.43

Step by Step Solution

1. Step 1: Write the proportion equation
   82,215.87 : 123,323.88 = 19,886.43 : x
2. Step 2: Convert to fraction form
   82,215.87/123,323.88 = 19,886.43/x
3. Step 3: Cross multiply
   82,215.87x = 123,323.88 × 19,886.43
4. Step 4: Simplify right side
   82,215.87x = 2,452,471,706.95
5. Step 5: Solve for x
   x = 2,452,471,706.95/82,215.87
6. Step 6: Final answer
   x = 29,829.66