Finding the Third Proportional to 615,888 and 978,081

Step by Step Solution

1. Step 1: Write the proportion equation
   615,888 : 978,081 = 978,081 : x
2. Step 2: Convert to fraction form
   615,888/978,081 = 978,081/x
3. Step 3: Cross multiply
   615,888x = 978,081 × 978,081
4. Step 4: Simplify right side
   615,888x = 956,642,442,561
5. Step 5: Solve for x
   x = 956,642,442,561/615,888
6. Step 6: Final answer
   x = 1,553,273.39