Finding the Fourth Proportional to 81,896.56, 113,032.72 and 51,283.86

Step by Step Solution

1. Step 1: Write the proportion equation
   81,896.56 : 113,032.72 = 51,283.86 : x
2. Step 2: Convert to fraction form
   81,896.56/113,032.72 = 51,283.86/x
3. Step 3: Cross multiply
   81,896.56x = 113,032.72 × 51,283.86
4. Step 4: Simplify right side
   81,896.56x = 5,796,754,187.90
5. Step 5: Solve for x
   x = 5,796,754,187.90/81,896.56
6. Step 6: Final answer
   x = 70,781.41