Finding the Third Proportional to 30,819.75 and 45,131.63

Step by Step Solution

1. Step 1: Write the proportion equation
   30,819.75 : 45,131.63 = 45,131.63 : x
2. Step 2: Convert to fraction form
   30,819.75/45,131.63 = 45,131.63/x
3. Step 3: Cross multiply
   30,819.75x = 45,131.63 × 45,131.63
4. Step 4: Simplify right side
   30,819.75x = 2,036,863,575.14
5. Step 5: Solve for x
   x = 2,036,863,575.14/30,819.75
6. Step 6: Final answer
   x = 66,089.56