Finding the Third Proportional to 646,788 and 1,406,832

Step by Step Solution

1. Step 1: Write the proportion equation
   646,788 : 1,406,832 = 1,406,832 : x
2. Step 2: Convert to fraction form
   646,788/1,406,832 = 1,406,832/x
3. Step 3: Cross multiply
   646,788x = 1,406,832 × 1,406,832
4. Step 4: Simplify right side
   646,788x = 1,979,176,276,224
5. Step 5: Solve for x
   x = 1,979,176,276,224/646,788
6. Step 6: Final answer
   x = 3,060,007.72