Finding the Third Proportional to 840,224 and 1,291,485

Step by Step Solution

1. Step 1: Write the proportion equation
   840,224 : 1,291,485 = 1,291,485 : x
2. Step 2: Convert to fraction form
   840,224/1,291,485 = 1,291,485/x
3. Step 3: Cross multiply
   840,224x = 1,291,485 × 1,291,485
4. Step 4: Simplify right side
   840,224x = 1,667,933,505,225
5. Step 5: Solve for x
   x = 1,667,933,505,225/840,224
6. Step 6: Final answer
   x = 1,985,105.76