Finding the Third Proportional to 2,931.19 and 3,457.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,931.19 : 3,457.69 = 3,457.69 : x
2. Step 2: Convert to fraction form
   2,931.19/3,457.69 = 3,457.69/x
3. Step 3: Cross multiply
   2,931.19x = 3,457.69 × 3,457.69
4. Step 4: Simplify right side
   2,931.19x = 11,955,602.85
5. Step 5: Solve for x
   x = 11,955,602.85/2,931.19
6. Step 6: Final answer
   x = 4,078.76