Finding the Third Proportional to 555,426 and 786,361.50

Step by Step Solution

1. Step 1: Write the proportion equation
   555,426 : 786,361.50 = 786,361.50 : x
2. Step 2: Convert to fraction form
   555,426/786,361.50 = 786,361.50/x
3. Step 3: Cross multiply
   555,426x = 786,361.50 × 786,361.50
4. Step 4: Simplify right side
   555,426x = 618,364,408,682.25
5. Step 5: Solve for x
   x = 618,364,408,682.25/555,426
6. Step 6: Final answer
   x = 1,113,315.56