Finding the Fourth Proportional to 271,005.89, 406,427.82 and 81,415.55

Step by Step Solution

1. Step 1: Write the proportion equation
   271,005.89 : 406,427.82 = 81,415.55 : x
2. Step 2: Convert to fraction form
   271,005.89/406,427.82 = 81,415.55/x
3. Step 3: Cross multiply
   271,005.89x = 406,427.82 × 81,415.55
4. Step 4: Simplify right side
   271,005.89x = 33,089,544,500.60
5. Step 5: Solve for x
   x = 33,089,544,500.60/271,005.89
6. Step 6: Final answer
   x = 122,098.99