Finding the Third Proportional to 578,139 and 1,271,608

Step by Step Solution

1. Step 1: Write the proportion equation
   578,139 : 1,271,608 = 1,271,608 : x
2. Step 2: Convert to fraction form
   578,139/1,271,608 = 1,271,608/x
3. Step 3: Cross multiply
   578,139x = 1,271,608 × 1,271,608
4. Step 4: Simplify right side
   578,139x = 1,616,986,905,664
5. Step 5: Solve for x
   x = 1,616,986,905,664/578,139
6. Step 6: Final answer
   x = 2,796,882.59