Finding the Third Proportional to 2,129,965 and 3,217,123

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129,965 : 3,217,123 = 3,217,123 : x
2. Step 2: Convert to fraction form
   2,129,965/3,217,123 = 3,217,123/x
3. Step 3: Cross multiply
   2,129,965x = 3,217,123 × 3,217,123
4. Step 4: Simplify right side
   2,129,965x = 10,349,880,397,129
5. Step 5: Solve for x
   x = 10,349,880,397,129/2,129,965
6. Step 6: Final answer
   x = 4,859,178.62