Finding the Fourth Proportional to 143,993.76, 215,989.72 and 49,178.20

Step by Step Solution

1. Step 1: Write the proportion equation
   143,993.76 : 215,989.72 = 49,178.20 : x
2. Step 2: Convert to fraction form
   143,993.76/215,989.72 = 49,178.20/x
3. Step 3: Cross multiply
   143,993.76x = 215,989.72 × 49,178.20
4. Step 4: Simplify right side
   143,993.76x = 10,621,985,648.10
5. Step 5: Solve for x
   x = 10,621,985,648.10/143,993.76
6. Step 6: Final answer
   x = 73,766.99