Finding the Third Proportional to 12,291.75 and 18,430.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,291.75 : 18,430.88 = 18,430.88 : x
2. Step 2: Convert to fraction form
   12,291.75/18,430.88 = 18,430.88/x
3. Step 3: Cross multiply
   12,291.75x = 18,430.88 × 18,430.88
4. Step 4: Simplify right side
   12,291.75x = 339,697,153.27
5. Step 5: Solve for x
   x = 339,697,153.27/12,291.75
6. Step 6: Final answer
   x = 27,636.19