Finding the Third Proportional to 261,222 and 573,817.50

Step by Step Solution

1. Step 1: Write the proportion equation
   261,222 : 573,817.50 = 573,817.50 : x
2. Step 2: Convert to fraction form
   261,222/573,817.50 = 573,817.50/x
3. Step 3: Cross multiply
   261,222x = 573,817.50 × 573,817.50
4. Step 4: Simplify right side
   261,222x = 329,266,523,306.25
5. Step 5: Solve for x
   x = 329,266,523,306.25/261,222
6. Step 6: Final answer
   x = 1,260,485.42