Finding the Third Proportional to 987,072 and 2,143,272

Step by Step Solution

1. Step 1: Write the proportion equation
   987,072 : 2,143,272 = 2,143,272 : x
2. Step 2: Convert to fraction form
   987,072/2,143,272 = 2,143,272/x
3. Step 3: Cross multiply
   987,072x = 2,143,272 × 2,143,272
4. Step 4: Simplify right side
   987,072x = 4,593,614,865,984
5. Step 5: Solve for x
   x = 4,593,614,865,984/987,072
6. Step 6: Final answer
   x = 4,653,778.92