Finding the Third Proportional to 1,278,699 and 1,909,296

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278,699 : 1,909,296 = 1,909,296 : x
2. Step 2: Convert to fraction form
   1,278,699/1,909,296 = 1,909,296/x
3. Step 3: Cross multiply
   1,278,699x = 1,909,296 × 1,909,296
4. Step 4: Simplify right side
   1,278,699x = 3,645,411,215,616
5. Step 5: Solve for x
   x = 3,645,411,215,616/1,278,699
6. Step 6: Final answer
   x = 2,850,875.16