Finding the Third Proportional to 1,917.42 and 4,155.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,917.42 : 4,155.68 = 4,155.68 : x
2. Step 2: Convert to fraction form
   1,917.42/4,155.68 = 4,155.68/x
3. Step 3: Cross multiply
   1,917.42x = 4,155.68 × 4,155.68
4. Step 4: Simplify right side
   1,917.42x = 17,269,673.67
5. Step 5: Solve for x
   x = 17,269,673.67/1,917.42
6. Step 6: Final answer
   x = 9,006.72