Finding the Third Proportional to 550,411 and 775,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   550,411 : 775,099.50 = 775,099.50 : x
2. Step 2: Convert to fraction form
   550,411/775,099.50 = 775,099.50/x
3. Step 3: Cross multiply
   550,411x = 775,099.50 × 775,099.50
4. Step 4: Simplify right side
   550,411x = 600,779,234,900.25
5. Step 5: Solve for x
   x = 600,779,234,900.25/550,411
6. Step 6: Final answer
   x = 1,091,510.23