Finding the Fourth Proportional to 89,142.80, 122,986.72 and 50,874.96

Step by Step Solution

1. Step 1: Write the proportion equation
   89,142.80 : 122,986.72 = 50,874.96 : x
2. Step 2: Convert to fraction form
   89,142.80/122,986.72 = 50,874.96/x
3. Step 3: Cross multiply
   89,142.80x = 122,986.72 × 50,874.96
4. Step 4: Simplify right side
   89,142.80x = 6,256,944,460.53
5. Step 5: Solve for x
   x = 6,256,944,460.53/89,142.80
6. Step 6: Final answer
   x = 70,190.13