Finding the Third Proportional to 873,678 and 1,868,798

Step by Step Solution

1. Step 1: Write the proportion equation
   873,678 : 1,868,798 = 1,868,798 : x
2. Step 2: Convert to fraction form
   873,678/1,868,798 = 1,868,798/x
3. Step 3: Cross multiply
   873,678x = 1,868,798 × 1,868,798
4. Step 4: Simplify right side
   873,678x = 3,492,405,964,804
5. Step 5: Solve for x
   x = 3,492,405,964,804/873,678
6. Step 6: Final answer
   x = 3,997,360.54