Finding the Third Proportional to 643,342 and 1,375,031

Step by Step Solution

1. Step 1: Write the proportion equation
   643,342 : 1,375,031 = 1,375,031 : x
2. Step 2: Convert to fraction form
   643,342/1,375,031 = 1,375,031/x
3. Step 3: Cross multiply
   643,342x = 1,375,031 × 1,375,031
4. Step 4: Simplify right side
   643,342x = 1,890,710,250,961
5. Step 5: Solve for x
   x = 1,890,710,250,961/643,342
6. Step 6: Final answer
   x = 2,938,888.26