Finding the Third Proportional to 691.31 and 1,123.03

Step by Step Solution

1. Step 1: Write the proportion equation
   691.31 : 1,123.03 = 1,123.03 : x
2. Step 2: Convert to fraction form
   691.31/1,123.03 = 1,123.03/x
3. Step 3: Cross multiply
   691.31x = 1,123.03 × 1,123.03
4. Step 4: Simplify right side
   691.31x = 1,261,199.19
5. Step 5: Solve for x
   x = 1,261,199.19/691.31
6. Step 6: Final answer
   x = 1,824.35