Finding the Third Proportional to 518,856 and 788,916

Step by Step Solution

1. Step 1: Write the proportion equation
   518,856 : 788,916 = 788,916 : x
2. Step 2: Convert to fraction form
   518,856/788,916 = 788,916/x
3. Step 3: Cross multiply
   518,856x = 788,916 × 788,916
4. Step 4: Simplify right side
   518,856x = 622,388,455,056
5. Step 5: Solve for x
   x = 622,388,455,056/518,856
6. Step 6: Final answer
   x = 1,199,539.86