Finding the Fourth Proportional to 57,986.56, 87,018.78 and 21,050.56

Step by Step Solution

1. Step 1: Write the proportion equation
   57,986.56 : 87,018.78 = 21,050.56 : x
2. Step 2: Convert to fraction form
   57,986.56/87,018.78 = 21,050.56/x
3. Step 3: Cross multiply
   57,986.56x = 87,018.78 × 21,050.56
4. Step 4: Simplify right side
   57,986.56x = 1,831,794,049.52
5. Step 5: Solve for x
   x = 1,831,794,049.52/57,986.56
6. Step 6: Final answer
   x = 31,589.98