Finding the Fourth Proportional to 140,918.78, 194,446.78 and 80,476.56

Step by Step Solution

1. Step 1: Write the proportion equation
   140,918.78 : 194,446.78 = 80,476.56 : x
2. Step 2: Convert to fraction form
   140,918.78/194,446.78 = 80,476.56/x
3. Step 3: Cross multiply
   140,918.78x = 194,446.78 × 80,476.56
4. Step 4: Simplify right side
   140,918.78x = 15,648,407,756.29
5. Step 5: Solve for x
   x = 15,648,407,756.29/140,918.78
6. Step 6: Final answer
   x = 111,045.58