Finding the Third Proportional to 647,697 and 905,729.63

Step by Step Solution

1. Step 1: Write the proportion equation
   647,697 : 905,729.63 = 905,729.63 : x
2. Step 2: Convert to fraction form
   647,697/905,729.63 = 905,729.63/x
3. Step 3: Cross multiply
   647,697x = 905,729.63 × 905,729.63
4. Step 4: Simplify right side
   647,697x = 820,346,153,602.64
5. Step 5: Solve for x
   x = 820,346,153,602.64/647,697
6. Step 6: Final answer
   x = 1,266,558.52