Finding the Third Proportional to 1,985,366 and 4,209,120

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985,366 : 4,209,120 = 4,209,120 : x
2. Step 2: Convert to fraction form
   1,985,366/4,209,120 = 4,209,120/x
3. Step 3: Cross multiply
   1,985,366x = 4,209,120 × 4,209,120
4. Step 4: Simplify right side
   1,985,366x = 17,716,691,174,400
5. Step 5: Solve for x
   x = 17,716,691,174,400/1,985,366
6. Step 6: Final answer
   x = 8,923,639.86