Finding the Fourth Proportional to 197,061.82, 271,989.61 and 129,039.28

Step by Step Solution

1. Step 1: Write the proportion equation
   197,061.82 : 271,989.61 = 129,039.28 : x
2. Step 2: Convert to fraction form
   197,061.82/271,989.61 = 129,039.28/x
3. Step 3: Cross multiply
   197,061.82x = 271,989.61 × 129,039.28
4. Step 4: Simplify right side
   197,061.82x = 35,097,344,058.59
5. Step 5: Solve for x
   x = 35,097,344,058.59/197,061.82
6. Step 6: Final answer
   x = 178,103.22