Finding the Third Proportional to 2,142,218 and 3,131,231

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142,218 : 3,131,231 = 3,131,231 : x
2. Step 2: Convert to fraction form
   2,142,218/3,131,231 = 3,131,231/x
3. Step 3: Cross multiply
   2,142,218x = 3,131,231 × 3,131,231
4. Step 4: Simplify right side
   2,142,218x = 9,804,607,575,361
5. Step 5: Solve for x
   x = 9,804,607,575,361/2,142,218
6. Step 6: Final answer
   x = 4,576,848.66