Finding the Third Proportional to 261,918 and 571,813.50

Step by Step Solution

1. Step 1: Write the proportion equation
   261,918 : 571,813.50 = 571,813.50 : x
2. Step 2: Convert to fraction form
   261,918/571,813.50 = 571,813.50/x
3. Step 3: Cross multiply
   261,918x = 571,813.50 × 571,813.50
4. Step 4: Simplify right side
   261,918x = 326,970,678,782.25
5. Step 5: Solve for x
   x = 326,970,678,782.25/261,918
6. Step 6: Final answer
   x = 1,248,370.40