Finding the Third Proportional to 698.91 and 1,492.31

Step by Step Solution

1. Step 1: Write the proportion equation
   698.91 : 1,492.31 = 1,492.31 : x
2. Step 2: Convert to fraction form
   698.91/1,492.31 = 1,492.31/x
3. Step 3: Cross multiply
   698.91x = 1,492.31 × 1,492.31
4. Step 4: Simplify right side
   698.91x = 2,226,996.60
5. Step 5: Solve for x
   x = 2,226,996.60/698.91
6. Step 6: Final answer
   x = 3,186.40