Finding the Third Proportional to 2,181,222 and 4,642,380

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181,222 : 4,642,380 = 4,642,380 : x
2. Step 2: Convert to fraction form
   2,181,222/4,642,380 = 4,642,380/x
3. Step 3: Cross multiply
   2,181,222x = 4,642,380 × 4,642,380
4. Step 4: Simplify right side
   2,181,222x = 21,551,692,064,400
5. Step 5: Solve for x
   x = 21,551,692,064,400/2,181,222
6. Step 6: Final answer
   x = 9,880,558.73