Finding the Third Proportional to 628,680 and 1,286,411.50

Step by Step Solution

1. Step 1: Write the proportion equation
   628,680 : 1,286,411.50 = 1,286,411.50 : x
2. Step 2: Convert to fraction form
   628,680/1,286,411.50 = 1,286,411.50/x
3. Step 3: Cross multiply
   628,680x = 1,286,411.50 × 1,286,411.50
4. Step 4: Simplify right side
   628,680x = 1,654,854,547,332.25
5. Step 5: Solve for x
   x = 1,654,854,547,332.25/628,680
6. Step 6: Final answer
   x = 2,632,268.48