Finding the Third Proportional to 13,609.69 and 21,386.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,609.69 : 21,386.63 = 21,386.63 : x
2. Step 2: Convert to fraction form
   13,609.69/21,386.63 = 21,386.63/x
3. Step 3: Cross multiply
   13,609.69x = 21,386.63 × 21,386.63
4. Step 4: Simplify right side
   13,609.69x = 457,387,728.89
5. Step 5: Solve for x
   x = 457,387,728.89/13,609.69
6. Step 6: Final answer
   x = 33,607.51