Finding the Third Proportional to 498,424 and 783,340

Step by Step Solution

1. Step 1: Write the proportion equation
   498,424 : 783,340 = 783,340 : x
2. Step 2: Convert to fraction form
   498,424/783,340 = 783,340/x
3. Step 3: Cross multiply
   498,424x = 783,340 × 783,340
4. Step 4: Simplify right side
   498,424x = 613,621,555,600
5. Step 5: Solve for x
   x = 613,621,555,600/498,424
6. Step 6: Final answer
   x = 1,231,123.61