Finding the Fourth Proportional to 83,676.78, 115,473.70 and 50,142.78

Step by Step Solution

1. Step 1: Write the proportion equation
   83,676.78 : 115,473.70 = 50,142.78 : x
2. Step 2: Convert to fraction form
   83,676.78/115,473.70 = 50,142.78/x
3. Step 3: Cross multiply
   83,676.78x = 115,473.70 × 50,142.78
4. Step 4: Simplify right side
   83,676.78x = 5,790,172,334.89
5. Step 5: Solve for x
   x = 5,790,172,334.89/83,676.78
6. Step 6: Final answer
   x = 69,196.88