Finding the Third Proportional to 581,642.25 and 868,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   581,642.25 : 868,990.50 = 868,990.50 : x
2. Step 2: Convert to fraction form
   581,642.25/868,990.50 = 868,990.50/x
3. Step 3: Cross multiply
   581,642.25x = 868,990.50 × 868,990.50
4. Step 4: Simplify right side
   581,642.25x = 755,144,489,090.25
5. Step 5: Solve for x
   x = 755,144,489,090.25/581,642.25
6. Step 6: Final answer
   x = 1,298,297.17