Finding the Fourth Proportional to 82,210.97, 123,316.52 and 19,881.47

Step by Step Solution

1. Step 1: Write the proportion equation
   82,210.97 : 123,316.52 = 19,881.47 : x
2. Step 2: Convert to fraction form
   82,210.97/123,316.52 = 19,881.47/x
3. Step 3: Cross multiply
   82,210.97x = 123,316.52 × 19,881.47
4. Step 4: Simplify right side
   82,210.97x = 2,451,712,976.89
5. Step 5: Solve for x
   x = 2,451,712,976.89/82,210.97
6. Step 6: Final answer
   x = 29,822.21