Finding the Third Proportional to 1,287,999 and 1,892,615

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287,999 : 1,892,615 = 1,892,615 : x
2. Step 2: Convert to fraction form
   1,287,999/1,892,615 = 1,892,615/x
3. Step 3: Cross multiply
   1,287,999x = 1,892,615 × 1,892,615
4. Step 4: Simplify right side
   1,287,999x = 3,581,991,538,225
5. Step 5: Solve for x
   x = 3,581,991,538,225/1,287,999
6. Step 6: Final answer
   x = 2,781,051.49