Finding the Third Proportional to 1,642.78 and 3,604.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.78 : 3,604.78 = 3,604.78 : x
2. Step 2: Convert to fraction form
   1,642.78/3,604.78 = 3,604.78/x
3. Step 3: Cross multiply
   1,642.78x = 3,604.78 × 3,604.78
4. Step 4: Simplify right side
   1,642.78x = 12,994,447.86
5. Step 5: Solve for x
   x = 12,994,447.86/1,642.78
6. Step 6: Final answer
   x = 7,910.03