Finding the Third Proportional to 879,178 and 1,371,256

Step by Step Solution

1. Step 1: Write the proportion equation
   879,178 : 1,371,256 = 1,371,256 : x
2. Step 2: Convert to fraction form
   879,178/1,371,256 = 1,371,256/x
3. Step 3: Cross multiply
   879,178x = 1,371,256 × 1,371,256
4. Step 4: Simplify right side
   879,178x = 1,880,343,017,536
5. Step 5: Solve for x
   x = 1,880,343,017,536/879,178
6. Step 6: Final answer
   x = 2,138,751.22