Finding the Third Proportional to 1,310,850 and 1,978,290

Step by Step Solution

1. Step 1: Write the proportion equation
   1,310,850 : 1,978,290 = 1,978,290 : x
2. Step 2: Convert to fraction form
   1,310,850/1,978,290 = 1,978,290/x
3. Step 3: Cross multiply
   1,310,850x = 1,978,290 × 1,978,290
4. Step 4: Simplify right side
   1,310,850x = 3,913,631,324,100
5. Step 5: Solve for x
   x = 3,913,631,324,100/1,310,850
6. Step 6: Final answer
   x = 2,985,567.63