Finding the Third Proportional to 911,792 and 1,978,132

Step by Step Solution

1. Step 1: Write the proportion equation
   911,792 : 1,978,132 = 1,978,132 : x
2. Step 2: Convert to fraction form
   911,792/1,978,132 = 1,978,132/x
3. Step 3: Cross multiply
   911,792x = 1,978,132 × 1,978,132
4. Step 4: Simplify right side
   911,792x = 3,913,006,209,424
5. Step 5: Solve for x
   x = 3,913,006,209,424/911,792
6. Step 6: Final answer
   x = 4,291,555.76