Finding the Fourth Proportional to 57,956.94, 86,892.89 and 18,491.31

Step by Step Solution

1. Step 1: Write the proportion equation
   57,956.94 : 86,892.89 = 18,491.31 : x
2. Step 2: Convert to fraction form
   57,956.94/86,892.89 = 18,491.31/x
3. Step 3: Cross multiply
   57,956.94x = 86,892.89 × 18,491.31
4. Step 4: Simplify right side
   57,956.94x = 1,606,763,273.33
5. Step 5: Solve for x
   x = 1,606,763,273.33/57,956.94
6. Step 6: Final answer
   x = 27,723.40