Finding the Fourth Proportional to 139,441.12, 209,186.79 and 50,819.02

Step by Step Solution

1. Step 1: Write the proportion equation
   139,441.12 : 209,186.79 = 50,819.02 : x
2. Step 2: Convert to fraction form
   139,441.12/209,186.79 = 50,819.02/x
3. Step 3: Cross multiply
   139,441.12x = 209,186.79 × 50,819.02
4. Step 4: Simplify right side
   139,441.12x = 10,630,667,664.75
5. Step 5: Solve for x
   x = 10,630,667,664.75/139,441.12
6. Step 6: Final answer
   x = 76,237.68