Finding the Third Proportional to 555,768 and 861,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   555,768 : 861,109.50 = 861,109.50 : x
2. Step 2: Convert to fraction form
   555,768/861,109.50 = 861,109.50/x
3. Step 3: Cross multiply
   555,768x = 861,109.50 × 861,109.50
4. Step 4: Simplify right side
   555,768x = 741,509,570,990.25
5. Step 5: Solve for x
   x = 741,509,570,990.25/555,768
6. Step 6: Final answer
   x = 1,334,207.03