Finding the Fourth Proportional to 83,668.78, 115,462.66 and 50,134.78

Step by Step Solution

1. Step 1: Write the proportion equation
   83,668.78 : 115,462.66 = 50,134.78 : x
2. Step 2: Convert to fraction form
   83,668.78/115,462.66 = 50,134.78/x
3. Step 3: Cross multiply
   83,668.78x = 115,462.66 × 50,134.78
4. Step 4: Simplify right side
   83,668.78x = 5,788,695,057.31
5. Step 5: Solve for x
   x = 5,788,695,057.31/83,668.78
6. Step 6: Final answer
   x = 69,185.84