Finding the Fourth Proportional to 81,789.06, 122,697.81 and 31,896.30

Step by Step Solution

1. Step 1: Write the proportion equation
   81,789.06 : 122,697.81 = 31,896.30 : x
2. Step 2: Convert to fraction form
   81,789.06/122,697.81 = 31,896.30/x
3. Step 3: Cross multiply
   81,789.06x = 122,697.81 × 31,896.30
4. Step 4: Simplify right side
   81,789.06x = 3,913,606,157.10
5. Step 5: Solve for x
   x = 3,913,606,157.10/81,789.06
6. Step 6: Final answer
   x = 47,850.00