Finding the Third Proportional to 1,587.09 and 3,490.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.09 : 3,490.17 = 3,490.17 : x
2. Step 2: Convert to fraction form
   1,587.09/3,490.17 = 3,490.17/x
3. Step 3: Cross multiply
   1,587.09x = 3,490.17 × 3,490.17
4. Step 4: Simplify right side
   1,587.09x = 12,181,299.72
5. Step 5: Solve for x
   x = 12,181,299.72/1,587.09
6. Step 6: Final answer
   x = 7,675.22