Finding the Third Proportional to 2,188.69 and 3,316.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.69 : 3,316.78 = 3,316.78 : x
2. Step 2: Convert to fraction form
   2,188.69/3,316.78 = 3,316.78/x
3. Step 3: Cross multiply
   2,188.69x = 3,316.78 × 3,316.78
4. Step 4: Simplify right side
   2,188.69x = 11,001,037.86
5. Step 5: Solve for x
   x = 11,001,037.86/2,188.69
6. Step 6: Final answer
   x = 5,026.32