Finding the Third Proportional to 1,390,402 and 1,862,259

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390,402 : 1,862,259 = 1,862,259 : x
2. Step 2: Convert to fraction form
   1,390,402/1,862,259 = 1,862,259/x
3. Step 3: Cross multiply
   1,390,402x = 1,862,259 × 1,862,259
4. Step 4: Simplify right side
   1,390,402x = 3,468,008,583,081
5. Step 5: Solve for x
   x = 3,468,008,583,081/1,390,402
6. Step 6: Final answer
   x = 2,494,248.85