Finding the Third Proportional to 261,148 and 571,499

Step by Step Solution

1. Step 1: Write the proportion equation
   261,148 : 571,499 = 571,499 : x
2. Step 2: Convert to fraction form
   261,148/571,499 = 571,499/x
3. Step 3: Cross multiply
   261,148x = 571,499 × 571,499
4. Step 4: Simplify right side
   261,148x = 326,611,107,001
5. Step 5: Solve for x
   x = 326,611,107,001/261,148
6. Step 6: Final answer
   x = 1,250,674.36