Finding the Third Proportional to 671,280.75 and 1,398,870

Step by Step Solution

1. Step 1: Write the proportion equation
   671,280.75 : 1,398,870 = 1,398,870 : x
2. Step 2: Convert to fraction form
   671,280.75/1,398,870 = 1,398,870/x
3. Step 3: Cross multiply
   671,280.75x = 1,398,870 × 1,398,870
4. Step 4: Simplify right side
   671,280.75x = 1,956,837,276,900
5. Step 5: Solve for x
   x = 1,956,837,276,900/671,280.75
6. Step 6: Final answer
   x = 2,915,080.28