Finding the Fourth Proportional to 22,366.72, 30,865.40 and 12,806.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,366.72 : 30,865.40 = 12,806.30 : x
2. Step 2: Convert to fraction form
   22,366.72/30,865.40 = 12,806.30/x
3. Step 3: Cross multiply
   22,366.72x = 30,865.40 × 12,806.30
4. Step 4: Simplify right side
   22,366.72x = 395,271,572.02
5. Step 5: Solve for x
   x = 395,271,572.02/22,366.72
6. Step 6: Final answer
   x = 17,672.31