Finding the Third Proportional to 643,526 and 1,410,685

Step by Step Solution

1. Step 1: Write the proportion equation
   643,526 : 1,410,685 = 1,410,685 : x
2. Step 2: Convert to fraction form
   643,526/1,410,685 = 1,410,685/x
3. Step 3: Cross multiply
   643,526x = 1,410,685 × 1,410,685
4. Step 4: Simplify right side
   643,526x = 1,990,032,169,225
5. Step 5: Solve for x
   x = 1,990,032,169,225/643,526
6. Step 6: Final answer
   x = 3,092,388.14