Finding the Third Proportional to 619,308.28 and 905,064.89

Step by Step Solution

1. Step 1: Write the proportion equation
   619,308.28 : 905,064.89 = 905,064.89 : x
2. Step 2: Convert to fraction form
   619,308.28/905,064.89 = 905,064.89/x
3. Step 3: Cross multiply
   619,308.28x = 905,064.89 × 905,064.89
4. Step 4: Simplify right side
   619,308.28x = 819,142,456,242.04
5. Step 5: Solve for x
   x = 819,142,456,242.04/619,308.28
6. Step 6: Final answer
   x = 1,322,673.18