Finding the Third Proportional to 550,623 and 851,038.50

Step by Step Solution

1. Step 1: Write the proportion equation
   550,623 : 851,038.50 = 851,038.50 : x
2. Step 2: Convert to fraction form
   550,623/851,038.50 = 851,038.50/x
3. Step 3: Cross multiply
   550,623x = 851,038.50 × 851,038.50
4. Step 4: Simplify right side
   550,623x = 724,266,528,482.25
5. Step 5: Solve for x
   x = 724,266,528,482.25/550,623
6. Step 6: Final answer
   x = 1,315,358.29