Finding the Third Proportional to 557,932 and 810,978

Step by Step Solution

1. Step 1: Write the proportion equation
   557,932 : 810,978 = 810,978 : x
2. Step 2: Convert to fraction form
   557,932/810,978 = 810,978/x
3. Step 3: Cross multiply
   557,932x = 810,978 × 810,978
4. Step 4: Simplify right side
   557,932x = 657,685,316,484
5. Step 5: Solve for x
   x = 657,685,316,484/557,932
6. Step 6: Final answer
   x = 1,178,791.17