Finding the Third Proportional to 2,178,900 and 4,654,260

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178,900 : 4,654,260 = 4,654,260 : x
2. Step 2: Convert to fraction form
   2,178,900/4,654,260 = 4,654,260/x
3. Step 3: Cross multiply
   2,178,900x = 4,654,260 × 4,654,260
4. Step 4: Simplify right side
   2,178,900x = 21,662,136,147,600
5. Step 5: Solve for x
   x = 21,662,136,147,600/2,178,900
6. Step 6: Final answer
   x = 9,941,776.19