Finding the Third Proportional to 717,507 and 1,561,131

Step by Step Solution

1. Step 1: Write the proportion equation
   717,507 : 1,561,131 = 1,561,131 : x
2. Step 2: Convert to fraction form
   717,507/1,561,131 = 1,561,131/x
3. Step 3: Cross multiply
   717,507x = 1,561,131 × 1,561,131
4. Step 4: Simplify right side
   717,507x = 2,437,129,999,161
5. Step 5: Solve for x
   x = 2,437,129,999,161/717,507
6. Step 6: Final answer
   x = 3,396,663.72