Finding the Third Proportional to 278,790 and 443,106

Step by Step Solution

1. Step 1: Write the proportion equation
   278,790 : 443,106 = 443,106 : x
2. Step 2: Convert to fraction form
   278,790/443,106 = 443,106/x
3. Step 3: Cross multiply
   278,790x = 443,106 × 443,106
4. Step 4: Simplify right side
   278,790x = 196,342,927,236
5. Step 5: Solve for x
   x = 196,342,927,236/278,790
6. Step 6: Final answer
   x = 704,268.18