Finding the Fourth Proportional to 57,892.98, 86,790.24 and 55,137.36

Step by Step Solution

1. Step 1: Write the proportion equation
   57,892.98 : 86,790.24 = 55,137.36 : x
2. Step 2: Convert to fraction form
   57,892.98/86,790.24 = 55,137.36/x
3. Step 3: Cross multiply
   57,892.98x = 86,790.24 × 55,137.36
4. Step 4: Simplify right side
   57,892.98x = 4,785,384,707.37
5. Step 5: Solve for x
   x = 4,785,384,707.37/57,892.98
6. Step 6: Final answer
   x = 82,659.15