Finding the Fourth Proportional to 143,405.78, 215,206.68 and 49,911.53

Step by Step Solution

1. Step 1: Write the proportion equation
   143,405.78 : 215,206.68 = 49,911.53 : x
2. Step 2: Convert to fraction form
   143,405.78/215,206.68 = 49,911.53/x
3. Step 3: Cross multiply
   143,405.78x = 215,206.68 × 49,911.53
4. Step 4: Simplify right side
   143,405.78x = 10,741,294,665.02
5. Step 5: Solve for x
   x = 10,741,294,665.02/143,405.78
6. Step 6: Final answer
   x = 74,901.41