Finding the Third Proportional to 561,231 and 855,858.50

Step by Step Solution

1. Step 1: Write the proportion equation
   561,231 : 855,858.50 = 855,858.50 : x
2. Step 2: Convert to fraction form
   561,231/855,858.50 = 855,858.50/x
3. Step 3: Cross multiply
   561,231x = 855,858.50 × 855,858.50
4. Step 4: Simplify right side
   561,231x = 732,493,772,022.25
5. Step 5: Solve for x
   x = 732,493,772,022.25/561,231
6. Step 6: Final answer
   x = 1,305,155.58