Finding the Fourth Proportional to 65,143.99, 89,857.76 and 50,013.59

Step by Step Solution

1. Step 1: Write the proportion equation
   65,143.99 : 89,857.76 = 50,013.59 : x
2. Step 2: Convert to fraction form
   65,143.99/89,857.76 = 50,013.59/x
3. Step 3: Cross multiply
   65,143.99x = 89,857.76 × 50,013.59
4. Step 4: Simplify right side
   65,143.99x = 4,494,109,166.96
5. Step 5: Solve for x
   x = 4,494,109,166.96/65,143.99
6. Step 6: Final answer
   x = 68,987.32