Finding the Fourth Proportional to 1,665.26, 2,495.82 and 690.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.26 : 2,495.82 = 690.38 : x
2. Step 2: Convert to fraction form
   1,665.26/2,495.82 = 690.38/x
3. Step 3: Cross multiply
   1,665.26x = 2,495.82 × 690.38
4. Step 4: Simplify right side
   1,665.26x = 1,723,064.21
5. Step 5: Solve for x
   x = 1,723,064.21/1,665.26
6. Step 6: Final answer
   x = 1,034.71