Finding the Third Proportional to 515,430 and 1,066,216.50

Step by Step Solution

1. Step 1: Write the proportion equation
   515,430 : 1,066,216.50 = 1,066,216.50 : x
2. Step 2: Convert to fraction form
   515,430/1,066,216.50 = 1,066,216.50/x
3. Step 3: Cross multiply
   515,430x = 1,066,216.50 × 1,066,216.50
4. Step 4: Simplify right side
   515,430x = 1,136,817,624,872.25
5. Step 5: Solve for x
   x = 1,136,817,624,872.25/515,430
6. Step 6: Final answer
   x = 2,205,571.32