Finding the Third Proportional to 1,915,415 and 2,856,513

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915,415 : 2,856,513 = 2,856,513 : x
2. Step 2: Convert to fraction form
   1,915,415/2,856,513 = 2,856,513/x
3. Step 3: Cross multiply
   1,915,415x = 2,856,513 × 2,856,513
4. Step 4: Simplify right side
   1,915,415x = 8,159,666,519,169
5. Step 5: Solve for x
   x = 8,159,666,519,169/1,915,415
6. Step 6: Final answer
   x = 4,259,999.28