Finding the Fourth Proportional to 81,981.56, 113,091.76 and 51,756

Step by Step Solution

1. Step 1: Write the proportion equation
   81,981.56 : 113,091.76 = 51,756 : x
2. Step 2: Convert to fraction form
   81,981.56/113,091.76 = 51,756/x
3. Step 3: Cross multiply
   81,981.56x = 113,091.76 × 51,756
4. Step 4: Simplify right side
   81,981.56x = 5,853,177,130.56
5. Step 5: Solve for x
   x = 5,853,177,130.56/81,981.56
6. Step 6: Final answer
   x = 71,396.26