Finding the Third Proportional to 989,172 and 1,488,398

Step by Step Solution

1. Step 1: Write the proportion equation
   989,172 : 1,488,398 = 1,488,398 : x
2. Step 2: Convert to fraction form
   989,172/1,488,398 = 1,488,398/x
3. Step 3: Cross multiply
   989,172x = 1,488,398 × 1,488,398
4. Step 4: Simplify right side
   989,172x = 2,215,328,606,404
5. Step 5: Solve for x
   x = 2,215,328,606,404/989,172
6. Step 6: Final answer
   x = 2,239,578.77