Finding the Third Proportional to 1,890,405 and 4,148,223

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890,405 : 4,148,223 = 4,148,223 : x
2. Step 2: Convert to fraction form
   1,890,405/4,148,223 = 4,148,223/x
3. Step 3: Cross multiply
   1,890,405x = 4,148,223 × 4,148,223
4. Step 4: Simplify right side
   1,890,405x = 17,207,754,057,729
5. Step 5: Solve for x
   x = 17,207,754,057,729/1,890,405
6. Step 6: Final answer
   x = 9,102,681.20