Finding the Fourth Proportional to 143,885, 215,847.20 and 49,089.73

Step by Step Solution

1. Step 1: Write the proportion equation
   143,885 : 215,847.20 = 49,089.73 : x
2. Step 2: Convert to fraction form
   143,885/215,847.20 = 49,089.73/x
3. Step 3: Cross multiply
   143,885x = 215,847.20 × 49,089.73
4. Step 4: Simplify right side
   143,885x = 10,595,880,769.26
5. Step 5: Solve for x
   x = 10,595,880,769.26/143,885
6. Step 6: Final answer
   x = 73,641.32