Finding the Third Proportional to 643,364 and 1,375,078

Step by Step Solution

1. Step 1: Write the proportion equation
   643,364 : 1,375,078 = 1,375,078 : x
2. Step 2: Convert to fraction form
   643,364/1,375,078 = 1,375,078/x
3. Step 3: Cross multiply
   643,364x = 1,375,078 × 1,375,078
4. Step 4: Simplify right side
   643,364x = 1,890,839,506,084
5. Step 5: Solve for x
   x = 1,890,839,506,084/643,364
6. Step 6: Final answer
   x = 2,938,988.67