Finding the Third Proportional to 598,400 and 1,290,112

Step by Step Solution

1. Step 1: Write the proportion equation
   598,400 : 1,290,112 = 1,290,112 : x
2. Step 2: Convert to fraction form
   598,400/1,290,112 = 1,290,112/x
3. Step 3: Cross multiply
   598,400x = 1,290,112 × 1,290,112
4. Step 4: Simplify right side
   598,400x = 1,664,388,972,544
5. Step 5: Solve for x
   x = 1,664,388,972,544/598,400
6. Step 6: Final answer
   x = 2,781,398.68