Finding the Third Proportional to 621,724 and 1,341,458

Step by Step Solution

1. Step 1: Write the proportion equation
   621,724 : 1,341,458 = 1,341,458 : x
2. Step 2: Convert to fraction form
   621,724/1,341,458 = 1,341,458/x
3. Step 3: Cross multiply
   621,724x = 1,341,458 × 1,341,458
4. Step 4: Simplify right side
   621,724x = 1,799,509,565,764
5. Step 5: Solve for x
   x = 1,799,509,565,764/621,724
6. Step 6: Final answer
   x = 2,894,386.52