Finding the Fourth Proportional to 143,406.78, 215,208.18 and 49,912.53

Step by Step Solution

1. Step 1: Write the proportion equation
   143,406.78 : 215,208.18 = 49,912.53 : x
2. Step 2: Convert to fraction form
   143,406.78/215,208.18 = 49,912.53/x
3. Step 3: Cross multiply
   143,406.78x = 215,208.18 × 49,912.53
4. Step 4: Simplify right side
   143,406.78x = 10,741,584,740.50
5. Step 5: Solve for x
   x = 10,741,584,740.50/143,406.78
6. Step 6: Final answer
   x = 74,902.91