Finding the Third Proportional to 2,115,072 and 4,372,416

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115,072 : 4,372,416 = 4,372,416 : x
2. Step 2: Convert to fraction form
   2,115,072/4,372,416 = 4,372,416/x
3. Step 3: Cross multiply
   2,115,072x = 4,372,416 × 4,372,416
4. Step 4: Simplify right side
   2,115,072x = 19,118,021,677,056
5. Step 5: Solve for x
   x = 19,118,021,677,056/2,115,072
6. Step 6: Final answer
   x = 9,038,946.04