Finding the Third Proportional to 1,680,428 and 2,415,666

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680,428 : 2,415,666 = 2,415,666 : x
2. Step 2: Convert to fraction form
   1,680,428/2,415,666 = 2,415,666/x
3. Step 3: Cross multiply
   1,680,428x = 2,415,666 × 2,415,666
4. Step 4: Simplify right side
   1,680,428x = 5,835,442,223,556
5. Step 5: Solve for x
   x = 5,835,442,223,556/1,680,428
6. Step 6: Final answer
   x = 3,472,592.83