Finding the Third Proportional to 643,376 and 1,375,088

Step by Step Solution

1. Step 1: Write the proportion equation
   643,376 : 1,375,088 = 1,375,088 : x
2. Step 2: Convert to fraction form
   643,376/1,375,088 = 1,375,088/x
3. Step 3: Cross multiply
   643,376x = 1,375,088 × 1,375,088
4. Step 4: Simplify right side
   643,376x = 1,890,867,007,744
5. Step 5: Solve for x
   x = 1,890,867,007,744/643,376
6. Step 6: Final answer
   x = 2,938,976.60