Finding the Third Proportional to 909.98 and 1,219.43

Step by Step Solution

1. Step 1: Write the proportion equation
   909.98 : 1,219.43 = 1,219.43 : x
2. Step 2: Convert to fraction form
   909.98/1,219.43 = 1,219.43/x
3. Step 3: Cross multiply
   909.98x = 1,219.43 × 1,219.43
4. Step 4: Simplify right side
   909.98x = 1,487,008.76
5. Step 5: Solve for x
   x = 1,487,008.76/909.98
6. Step 6: Final answer
   x = 1,634.10