Finding the Third Proportional to 2,135,172 and 4,664,328

Step by Step Solution

1. Step 1: Write the proportion equation
   2,135,172 : 4,664,328 = 4,664,328 : x
2. Step 2: Convert to fraction form
   2,135,172/4,664,328 = 4,664,328/x
3. Step 3: Cross multiply
   2,135,172x = 4,664,328 × 4,664,328
4. Step 4: Simplify right side
   2,135,172x = 21,755,955,691,584
5. Step 5: Solve for x
   x = 21,755,955,691,584/2,135,172
6. Step 6: Final answer
   x = 10,189,322.31