Finding the Third Proportional to 1,391,105 and 2,931,660

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391,105 : 2,931,660 = 2,931,660 : x
2. Step 2: Convert to fraction form
   1,391,105/2,931,660 = 2,931,660/x
3. Step 3: Cross multiply
   1,391,105x = 2,931,660 × 2,931,660
4. Step 4: Simplify right side
   1,391,105x = 8,594,630,355,600
5. Step 5: Solve for x
   x = 8,594,630,355,600/1,391,105
6. Step 6: Final answer
   x = 6,178,275.80