Finding the Third Proportional to 13,423.50 and 19,724.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,423.50 : 19,724.30 = 19,724.30 : x
2. Step 2: Convert to fraction form
   13,423.50/19,724.30 = 19,724.30/x
3. Step 3: Cross multiply
   13,423.50x = 19,724.30 × 19,724.30
4. Step 4: Simplify right side
   13,423.50x = 389,047,887.21
5. Step 5: Solve for x
   x = 389,047,887.21/13,423.50
6. Step 6: Final answer
   x = 28,982.60