Finding the Fourth Proportional to 82,143.36, 123,215.18 and 19,813.86

Step by Step Solution

1. Step 1: Write the proportion equation
   82,143.36 : 123,215.18 = 19,813.86 : x
2. Step 2: Convert to fraction form
   82,143.36/123,215.18 = 19,813.86/x
3. Step 3: Cross multiply
   82,143.36x = 123,215.18 × 19,813.86
4. Step 4: Simplify right side
   82,143.36x = 2,441,368,227.33
5. Step 5: Solve for x
   x = 2,441,368,227.33/82,143.36
6. Step 6: Final answer
   x = 29,720.82