Finding the Third Proportional to 10,439.51 and 19,819.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,439.51 : 19,819.69 = 19,819.69 : x
2. Step 2: Convert to fraction form
   10,439.51/19,819.69 = 19,819.69/x
3. Step 3: Cross multiply
   10,439.51x = 19,819.69 × 19,819.69
4. Step 4: Simplify right side
   10,439.51x = 392,820,012.60
5. Step 5: Solve for x
   x = 392,820,012.60/10,439.51
6. Step 6: Final answer
   x = 37,628.21