Finding the Third Proportional to 3,994.31 and 8,307.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,994.31 : 8,307.56 = 8,307.56 : x
2. Step 2: Convert to fraction form
   3,994.31/8,307.56 = 8,307.56/x
3. Step 3: Cross multiply
   3,994.31x = 8,307.56 × 8,307.56
4. Step 4: Simplify right side
   3,994.31x = 69,015,594.69
5. Step 5: Solve for x
   x = 69,015,594.69/3,994.31
6. Step 6: Final answer
   x = 17,278.47