Finding the Third Proportional to 340,139 and 744,790

Step by Step Solution

1. Step 1: Write the proportion equation
   340,139 : 744,790 = 744,790 : x
2. Step 2: Convert to fraction form
   340,139/744,790 = 744,790/x
3. Step 3: Cross multiply
   340,139x = 744,790 × 744,790
4. Step 4: Simplify right side
   340,139x = 554,712,144,100
5. Step 5: Solve for x
   x = 554,712,144,100/340,139
6. Step 6: Final answer
   x = 1,630,839.58