Finding the Third Proportional to 1,368,980 and 2,128,140

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368,980 : 2,128,140 = 2,128,140 : x
2. Step 2: Convert to fraction form
   1,368,980/2,128,140 = 2,128,140/x
3. Step 3: Cross multiply
   1,368,980x = 2,128,140 × 2,128,140
4. Step 4: Simplify right side
   1,368,980x = 4,528,979,859,600
5. Step 5: Solve for x
   x = 4,528,979,859,600/1,368,980
6. Step 6: Final answer
   x = 3,308,287.82