Finding the Third Proportional to 550,435.50 and 850,558.50

Step by Step Solution

1. Step 1: Write the proportion equation
   550,435.50 : 850,558.50 = 850,558.50 : x
2. Step 2: Convert to fraction form
   550,435.50/850,558.50 = 850,558.50/x
3. Step 3: Cross multiply
   550,435.50x = 850,558.50 × 850,558.50
4. Step 4: Simplify right side
   550,435.50x = 723,449,761,922.25
5. Step 5: Solve for x
   x = 723,449,761,922.25/550,435.50
6. Step 6: Final answer
   x = 1,314,322.50