Finding the Fourth Proportional to 81,993.29, 113,112.06 and 47,980.72

Step by Step Solution

1. Step 1: Write the proportion equation
   81,993.29 : 113,112.06 = 47,980.72 : x
2. Step 2: Convert to fraction form
   81,993.29/113,112.06 = 47,980.72/x
3. Step 3: Cross multiply
   81,993.29x = 113,112.06 × 47,980.72
4. Step 4: Simplify right side
   81,993.29x = 5,427,198,079.48
5. Step 5: Solve for x
   x = 5,427,198,079.48/81,993.29
6. Step 6: Final answer
   x = 66,190.76