Finding the Third Proportional to 2,179,280 and 4,788,400

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179,280 : 4,788,400 = 4,788,400 : x
2. Step 2: Convert to fraction form
   2,179,280/4,788,400 = 4,788,400/x
3. Step 3: Cross multiply
   2,179,280x = 4,788,400 × 4,788,400
4. Step 4: Simplify right side
   2,179,280x = 22,928,774,560,000
5. Step 5: Solve for x
   x = 22,928,774,560,000/2,179,280
6. Step 6: Final answer
   x = 10,521,261.41