Finding the Third Proportional to 3,111.19 and 5,491.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.19 : 5,491.69 = 5,491.69 : x
2. Step 2: Convert to fraction form
   3,111.19/5,491.69 = 5,491.69/x
3. Step 3: Cross multiply
   3,111.19x = 5,491.69 × 5,491.69
4. Step 4: Simplify right side
   3,111.19x = 30,158,631.60
5. Step 5: Solve for x
   x = 30,158,631.60/3,111.19
6. Step 6: Final answer
   x = 9,693.61