Finding the Fourth Proportional to 81,940.51, 113,007.39 and 56,488.27

Step by Step Solution

1. Step 1: Write the proportion equation
   81,940.51 : 113,007.39 = 56,488.27 : x
2. Step 2: Convert to fraction form
   81,940.51/113,007.39 = 56,488.27/x
3. Step 3: Cross multiply
   81,940.51x = 113,007.39 × 56,488.27
4. Step 4: Simplify right side
   81,940.51x = 6,383,591,958.32
5. Step 5: Solve for x
   x = 6,383,591,958.32/81,940.51
6. Step 6: Final answer
   x = 77,905.20