Finding the Third Proportional to 619,326 and 905,090.63

Step by Step Solution

1. Step 1: Write the proportion equation
   619,326 : 905,090.63 = 905,090.63 : x
2. Step 2: Convert to fraction form
   619,326/905,090.63 = 905,090.63/x
3. Step 3: Cross multiply
   619,326x = 905,090.63 × 905,090.63
4. Step 4: Simplify right side
   619,326x = 819,189,039,462.89
5. Step 5: Solve for x
   x = 819,189,039,462.89/619,326
6. Step 6: Final answer
   x = 1,322,710.56