Finding the Third Proportional to 245,398 and 519,090

Step by Step Solution

1. Step 1: Write the proportion equation
   245,398 : 519,090 = 519,090 : x
2. Step 2: Convert to fraction form
   245,398/519,090 = 519,090/x
3. Step 3: Cross multiply
   245,398x = 519,090 × 519,090
4. Step 4: Simplify right side
   245,398x = 269,454,428,100
5. Step 5: Solve for x
   x = 269,454,428,100/245,398
6. Step 6: Final answer
   x = 1,098,030.25