Finding the Third Proportional to 3,982,428 and 8,739,000

Step by Step Solution

1. Step 1: Write the proportion equation
   3,982,428 : 8,739,000 = 8,739,000 : x
2. Step 2: Convert to fraction form
   3,982,428/8,739,000 = 8,739,000/x
3. Step 3: Cross multiply
   3,982,428x = 8,739,000 × 8,739,000
4. Step 4: Simplify right side
   3,982,428x = 76,370,121,000,000
5. Step 5: Solve for x
   x = 76,370,121,000,000/3,982,428
6. Step 6: Final answer
   x = 19,176,773.82