Finding the Third Proportional to 917,912 and 1,988,320

Step by Step Solution

1. Step 1: Write the proportion equation
   917,912 : 1,988,320 = 1,988,320 : x
2. Step 2: Convert to fraction form
   917,912/1,988,320 = 1,988,320/x
3. Step 3: Cross multiply
   917,912x = 1,988,320 × 1,988,320
4. Step 4: Simplify right side
   917,912x = 3,953,416,422,400
5. Step 5: Solve for x
   x = 3,953,416,422,400/917,912
6. Step 6: Final answer
   x = 4,306,966.71