Finding the Third Proportional to 12,399.75 and 22,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,399.75 : 22,990.50 = 22,990.50 : x
2. Step 2: Convert to fraction form
   12,399.75/22,990.50 = 22,990.50/x
3. Step 3: Cross multiply
   12,399.75x = 22,990.50 × 22,990.50
4. Step 4: Simplify right side
   12,399.75x = 528,563,090.25
5. Step 5: Solve for x
   x = 528,563,090.25/12,399.75
6. Step 6: Final answer
   x = 42,626.92