Finding the Fourth Proportional to 140,601.78, 194,029.61 and 129,164.09

Step by Step Solution

1. Step 1: Write the proportion equation
   140,601.78 : 194,029.61 = 129,164.09 : x
2. Step 2: Convert to fraction form
   140,601.78/194,029.61 = 129,164.09/x
3. Step 3: Cross multiply
   140,601.78x = 194,029.61 × 129,164.09
4. Step 4: Simplify right side
   140,601.78x = 25,061,656,392.74
5. Step 5: Solve for x
   x = 25,061,656,392.74/140,601.78
6. Step 6: Final answer
   x = 178,245.66