Finding the Third Proportional to 1,158.68 and 1,698.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.68 : 1,698.15 = 1,698.15 : x
2. Step 2: Convert to fraction form
   1,158.68/1,698.15 = 1,698.15/x
3. Step 3: Cross multiply
   1,158.68x = 1,698.15 × 1,698.15
4. Step 4: Simplify right side
   1,158.68x = 2,883,721.38
5. Step 5: Solve for x
   x = 2,883,721.38/1,158.68
6. Step 6: Final answer
   x = 2,488.80