Finding the Fourth Proportional to 50,638.20, 69,880.32 and 27,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   50,638.20 : 69,880.32 = 27,978.72 : x
2. Step 2: Convert to fraction form
   50,638.20/69,880.32 = 27,978.72/x
3. Step 3: Cross multiply
   50,638.20x = 69,880.32 × 27,978.72
4. Step 4: Simplify right side
   50,638.20x = 1,955,161,906.79
5. Step 5: Solve for x
   x = 1,955,161,906.79/50,638.20
6. Step 6: Final answer
   x = 38,610.41