Finding the Third Proportional to 2,116,778 and 3,179,931

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116,778 : 3,179,931 = 3,179,931 : x
2. Step 2: Convert to fraction form
   2,116,778/3,179,931 = 3,179,931/x
3. Step 3: Cross multiply
   2,116,778x = 3,179,931 × 3,179,931
4. Step 4: Simplify right side
   2,116,778x = 10,111,961,164,761
5. Step 5: Solve for x
   x = 10,111,961,164,761/2,116,778
6. Step 6: Final answer
   x = 4,777,053.22