Finding the Third Proportional to 14,109.19 and 21,115.69

Step by Step Solution

1. Step 1: Write the proportion equation
   14,109.19 : 21,115.69 = 21,115.69 : x
2. Step 2: Convert to fraction form
   14,109.19/21,115.69 = 21,115.69/x
3. Step 3: Cross multiply
   14,109.19x = 21,115.69 × 21,115.69
4. Step 4: Simplify right side
   14,109.19x = 445,872,258.60
5. Step 5: Solve for x
   x = 445,872,258.60/14,109.19
6. Step 6: Final answer
   x = 31,601.55