Finding the Fourth Proportional to 50,640.42, 69,877.81 and 27,978.06

Step by Step Solution

1. Step 1: Write the proportion equation
   50,640.42 : 69,877.81 = 27,978.06 : x
2. Step 2: Convert to fraction form
   50,640.42/69,877.81 = 27,978.06/x
3. Step 3: Cross multiply
   50,640.42x = 69,877.81 × 27,978.06
4. Step 4: Simplify right side
   50,640.42x = 1,955,045,560.85
5. Step 5: Solve for x
   x = 1,955,045,560.85/50,640.42
6. Step 6: Final answer
   x = 38,606.42