Finding the Fourth Proportional to 81,932.58, 113,081.91 and 47,939.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,932.58 : 113,081.91 = 47,939.10 : x
2. Step 2: Convert to fraction form
   81,932.58/113,081.91 = 47,939.10/x
3. Step 3: Cross multiply
   81,932.58x = 113,081.91 × 47,939.10
4. Step 4: Simplify right side
   81,932.58x = 5,421,044,991.68
5. Step 5: Solve for x
   x = 5,421,044,991.68/81,932.58
6. Step 6: Final answer
   x = 66,164.71