Finding the Third Proportional to 681,558 and 1,406,820

Step by Step Solution

1. Step 1: Write the proportion equation
   681,558 : 1,406,820 = 1,406,820 : x
2. Step 2: Convert to fraction form
   681,558/1,406,820 = 1,406,820/x
3. Step 3: Cross multiply
   681,558x = 1,406,820 × 1,406,820
4. Step 4: Simplify right side
   681,558x = 1,979,142,512,400
5. Step 5: Solve for x
   x = 1,979,142,512,400/681,558
6. Step 6: Final answer
   x = 2,903,850.46