Finding the Fourth Proportional to 50,419.21, 69,428.45 and 49,300.37

Step by Step Solution

1. Step 1: Write the proportion equation
   50,419.21 : 69,428.45 = 49,300.37 : x
2. Step 2: Convert to fraction form
   50,419.21/69,428.45 = 49,300.37/x
3. Step 3: Cross multiply
   50,419.21x = 69,428.45 × 49,300.37
4. Step 4: Simplify right side
   50,419.21x = 3,422,848,273.53
5. Step 5: Solve for x
   x = 3,422,848,273.53/50,419.21
6. Step 6: Final answer
   x = 67,887.78