Finding the Third Proportional to 931.18 and 1,409.59

Step by Step Solution

1. Step 1: Write the proportion equation
   931.18 : 1,409.59 = 1,409.59 : x
2. Step 2: Convert to fraction form
   931.18/1,409.59 = 1,409.59/x
3. Step 3: Cross multiply
   931.18x = 1,409.59 × 1,409.59
4. Step 4: Simplify right side
   931.18x = 1,986,943.53
5. Step 5: Solve for x
   x = 1,986,943.53/931.18
6. Step 6: Final answer
   x = 2,133.78