Finding the Fourth Proportional to 8,570.89, 12,849.78 and 5,931.37

Step by Step Solution

1. Step 1: Write the proportion equation
   8,570.89 : 12,849.78 = 5,931.37 : x
2. Step 2: Convert to fraction form
   8,570.89/12,849.78 = 5,931.37/x
3. Step 3: Cross multiply
   8,570.89x = 12,849.78 × 5,931.37
4. Step 4: Simplify right side
   8,570.89x = 76,216,767.47
5. Step 5: Solve for x
   x = 76,216,767.47/8,570.89
6. Step 6: Final answer
   x = 8,892.52