Finding the Third Proportional to 611,874 and 881,280

Step by Step Solution

1. Step 1: Write the proportion equation
   611,874 : 881,280 = 881,280 : x
2. Step 2: Convert to fraction form
   611,874/881,280 = 881,280/x
3. Step 3: Cross multiply
   611,874x = 881,280 × 881,280
4. Step 4: Simplify right side
   611,874x = 776,654,438,400
5. Step 5: Solve for x
   x = 776,654,438,400/611,874
6. Step 6: Final answer
   x = 1,269,304.53