Finding the Third Proportional to 1,339.69 and 3,130.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.69 : 3,130.69 = 3,130.69 : x
2. Step 2: Convert to fraction form
   1,339.69/3,130.69 = 3,130.69/x
3. Step 3: Cross multiply
   1,339.69x = 3,130.69 × 3,130.69
4. Step 4: Simplify right side
   1,339.69x = 9,801,204.22
5. Step 5: Solve for x
   x = 9,801,204.22/1,339.69
6. Step 6: Final answer
   x = 7,316.04