Finding the Fourth Proportional to 50,978.14, 70,351.12 and 28,316.05

Step by Step Solution

1. Step 1: Write the proportion equation
   50,978.14 : 70,351.12 = 28,316.05 : x
2. Step 2: Convert to fraction form
   50,978.14/70,351.12 = 28,316.05/x
3. Step 3: Cross multiply
   50,978.14x = 70,351.12 × 28,316.05
4. Step 4: Simplify right side
   50,978.14x = 1,992,065,531.72
5. Step 5: Solve for x
   x = 1,992,065,531.72/50,978.14
6. Step 6: Final answer
   x = 39,076.86