Finding the Third Proportional to 1,986,457 and 4,287,840

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986,457 : 4,287,840 = 4,287,840 : x
2. Step 2: Convert to fraction form
   1,986,457/4,287,840 = 4,287,840/x
3. Step 3: Cross multiply
   1,986,457x = 4,287,840 × 4,287,840
4. Step 4: Simplify right side
   1,986,457x = 18,385,571,865,600
5. Step 5: Solve for x
   x = 18,385,571,865,600/1,986,457
6. Step 6: Final answer
   x = 9,255,459.28