Finding the Third Proportional to 1,081.69 and 1,621.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.69 : 1,621.88 = 1,621.88 : x
2. Step 2: Convert to fraction form
   1,081.69/1,621.88 = 1,621.88/x
3. Step 3: Cross multiply
   1,081.69x = 1,621.88 × 1,621.88
4. Step 4: Simplify right side
   1,081.69x = 2,630,478.52
5. Step 5: Solve for x
   x = 2,630,478.52/1,081.69
6. Step 6: Final answer
   x = 2,431.83