Finding the Third Proportional to 551,448 and 866,536.50

Step by Step Solution

1. Step 1: Write the proportion equation
   551,448 : 866,536.50 = 866,536.50 : x
2. Step 2: Convert to fraction form
   551,448/866,536.50 = 866,536.50/x
3. Step 3: Cross multiply
   551,448x = 866,536.50 × 866,536.50
4. Step 4: Simplify right side
   551,448x = 750,885,505,832.25
5. Step 5: Solve for x
   x = 750,885,505,832.25/551,448
6. Step 6: Final answer
   x = 1,361,661.49