Finding the Third Proportional to 581,603 and 853,234.50

Step by Step Solution

1. Step 1: Write the proportion equation
   581,603 : 853,234.50 = 853,234.50 : x
2. Step 2: Convert to fraction form
   581,603/853,234.50 = 853,234.50/x
3. Step 3: Cross multiply
   581,603x = 853,234.50 × 853,234.50
4. Step 4: Simplify right side
   581,603x = 728,009,111,990.25
5. Step 5: Solve for x
   x = 728,009,111,990.25/581,603
6. Step 6: Final answer
   x = 1,251,728.61