Finding the Third Proportional to 2,179,972 and 3,402,390

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179,972 : 3,402,390 = 3,402,390 : x
2. Step 2: Convert to fraction form
   2,179,972/3,402,390 = 3,402,390/x
3. Step 3: Cross multiply
   2,179,972x = 3,402,390 × 3,402,390
4. Step 4: Simplify right side
   2,179,972x = 11,576,257,712,100
5. Step 5: Solve for x
   x = 11,576,257,712,100/2,179,972
6. Step 6: Final answer
   x = 5,310,278.17