Finding the Third Proportional to 1,357,478 and 2,680,690

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357,478 : 2,680,690 = 2,680,690 : x
2. Step 2: Convert to fraction form
   1,357,478/2,680,690 = 2,680,690/x
3. Step 3: Cross multiply
   1,357,478x = 2,680,690 × 2,680,690
4. Step 4: Simplify right side
   1,357,478x = 7,186,098,876,100
5. Step 5: Solve for x
   x = 7,186,098,876,100/1,357,478
6. Step 6: Final answer
   x = 5,293,712.96