Finding the Third Proportional to 411.19 and 890.72

Step by Step Solution

1. Step 1: Write the proportion equation
   411.19 : 890.72 = 890.72 : x
2. Step 2: Convert to fraction form
   411.19/890.72 = 890.72/x
3. Step 3: Cross multiply
   411.19x = 890.72 × 890.72
4. Step 4: Simplify right side
   411.19x = 793,379.89
5. Step 5: Solve for x
   x = 793,379.89/411.19
6. Step 6: Final answer
   x = 1,929.48