Finding the Third Proportional to 528,819 and 805,621.50

Step by Step Solution

1. Step 1: Write the proportion equation
   528,819 : 805,621.50 = 805,621.50 : x
2. Step 2: Convert to fraction form
   528,819/805,621.50 = 805,621.50/x
3. Step 3: Cross multiply
   528,819x = 805,621.50 × 805,621.50
4. Step 4: Simplify right side
   528,819x = 649,026,001,262.25
5. Step 5: Solve for x
   x = 649,026,001,262.25/528,819
6. Step 6: Final answer
   x = 1,227,312.18