Finding the Third Proportional to 2,211.68 and 3,123.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,211.68 : 3,123.88 = 3,123.88 : x
2. Step 2: Convert to fraction form
   2,211.68/3,123.88 = 3,123.88/x
3. Step 3: Cross multiply
   2,211.68x = 3,123.88 × 3,123.88
4. Step 4: Simplify right side
   2,211.68x = 9,758,619.42
5. Step 5: Solve for x
   x = 9,758,619.42/2,211.68
6. Step 6: Final answer
   x = 4,412.31