Finding the Fourth Proportional to 23,058.06, 31,820.24 and 12,986.67

Step by Step Solution

1. Step 1: Write the proportion equation
   23,058.06 : 31,820.24 = 12,986.67 : x
2. Step 2: Convert to fraction form
   23,058.06/31,820.24 = 12,986.67/x
3. Step 3: Cross multiply
   23,058.06x = 31,820.24 × 12,986.67
4. Step 4: Simplify right side
   23,058.06x = 413,238,956.20
5. Step 5: Solve for x
   x = 413,238,956.20/23,058.06
6. Step 6: Final answer
   x = 17,921.67