Finding the Third Proportional to 555,357.50 and 811,986

Step by Step Solution

1. Step 1: Write the proportion equation
   555,357.50 : 811,986 = 811,986 : x
2. Step 2: Convert to fraction form
   555,357.50/811,986 = 811,986/x
3. Step 3: Cross multiply
   555,357.50x = 811,986 × 811,986
4. Step 4: Simplify right side
   555,357.50x = 659,321,264,196
5. Step 5: Solve for x
   x = 659,321,264,196/555,357.50
6. Step 6: Final answer
   x = 1,187,201.51