Finding the Third Proportional to 1,213,520 and 2,638,832

Step by Step Solution

1. Step 1: Write the proportion equation
   1,213,520 : 2,638,832 = 2,638,832 : x
2. Step 2: Convert to fraction form
   1,213,520/2,638,832 = 2,638,832/x
3. Step 3: Cross multiply
   1,213,520x = 2,638,832 × 2,638,832
4. Step 4: Simplify right side
   1,213,520x = 6,963,434,324,224
5. Step 5: Solve for x
   x = 6,963,434,324,224/1,213,520
6. Step 6: Final answer
   x = 5,738,211.42