Finding the Fourth Proportional to 57,698.96, 86,563.72 and 18,256.72

Step by Step Solution

1. Step 1: Write the proportion equation
   57,698.96 : 86,563.72 = 18,256.72 : x
2. Step 2: Convert to fraction form
   57,698.96/86,563.72 = 18,256.72/x
3. Step 3: Cross multiply
   57,698.96x = 86,563.72 × 18,256.72
4. Step 4: Simplify right side
   57,698.96x = 1,580,369,598.20
5. Step 5: Solve for x
   x = 1,580,369,598.20/57,698.96
6. Step 6: Final answer
   x = 27,389.91