Finding the Fourth Proportional to 271,518.71, 407,343.89 and 81,967.75

Step by Step Solution

1. Step 1: Write the proportion equation
   271,518.71 : 407,343.89 = 81,967.75 : x
2. Step 2: Convert to fraction form
   271,518.71/407,343.89 = 81,967.75/x
3. Step 3: Cross multiply
   271,518.71x = 407,343.89 × 81,967.75
4. Step 4: Simplify right side
   271,518.71x = 33,389,061,326.11
5. Step 5: Solve for x
   x = 33,389,061,326.11/271,518.71
6. Step 6: Final answer
   x = 122,971.50