Finding the Third Proportional to 1,215,048 and 2,658,840

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,048 : 2,658,840 = 2,658,840 : x
2. Step 2: Convert to fraction form
   1,215,048/2,658,840 = 2,658,840/x
3. Step 3: Cross multiply
   1,215,048x = 2,658,840 × 2,658,840
4. Step 4: Simplify right side
   1,215,048x = 7,069,430,145,600
5. Step 5: Solve for x
   x = 7,069,430,145,600/1,215,048
6. Step 6: Final answer
   x = 5,818,231.17