Finding the Third Proportional to 622,560 and 1,406,784

Step by Step Solution

1. Step 1: Write the proportion equation
   622,560 : 1,406,784 = 1,406,784 : x
2. Step 2: Convert to fraction form
   622,560/1,406,784 = 1,406,784/x
3. Step 3: Cross multiply
   622,560x = 1,406,784 × 1,406,784
4. Step 4: Simplify right side
   622,560x = 1,979,041,222,656
5. Step 5: Solve for x
   x = 1,979,041,222,656/622,560
6. Step 6: Final answer
   x = 3,178,876.29