Finding the Fourth Proportional to 83,682.24, 115,433.28 and 50,128.80

Step by Step Solution

1. Step 1: Write the proportion equation
   83,682.24 : 115,433.28 = 50,128.80 : x
2. Step 2: Convert to fraction form
   83,682.24/115,433.28 = 50,128.80/x
3. Step 3: Cross multiply
   83,682.24x = 115,433.28 × 50,128.80
4. Step 4: Simplify right side
   83,682.24x = 5,786,531,806.46
5. Step 5: Solve for x
   x = 5,786,531,806.46/83,682.24
6. Step 6: Final answer
   x = 69,148.86