Finding the Fourth Proportional to 271,404.89, 406,997.94 and 81,806.57

Step by Step Solution

1. Step 1: Write the proportion equation
   271,404.89 : 406,997.94 = 81,806.57 : x
2. Step 2: Convert to fraction form
   271,404.89/406,997.94 = 81,806.57/x
3. Step 3: Cross multiply
   271,404.89x = 406,997.94 × 81,806.57
4. Step 4: Simplify right side
   271,404.89x = 33,295,105,468.47
5. Step 5: Solve for x
   x = 33,295,105,468.47/271,404.89
6. Step 6: Final answer
   x = 122,676.88