Finding the Fourth Proportional to 21,073.08, 31,601.86 and 8,586.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,073.08 : 31,601.86 = 8,586.34 : x
2. Step 2: Convert to fraction form
   21,073.08/31,601.86 = 8,586.34/x
3. Step 3: Cross multiply
   21,073.08x = 31,601.86 × 8,586.34
4. Step 4: Simplify right side
   21,073.08x = 271,344,314.59
5. Step 5: Solve for x
   x = 271,344,314.59/21,073.08
6. Step 6: Final answer
   x = 12,876.35