Finding the Third Proportional to 621,117 and 879,066

Step by Step Solution

1. Step 1: Write the proportion equation
   621,117 : 879,066 = 879,066 : x
2. Step 2: Convert to fraction form
   621,117/879,066 = 879,066/x
3. Step 3: Cross multiply
   621,117x = 879,066 × 879,066
4. Step 4: Simplify right side
   621,117x = 772,757,032,356
5. Step 5: Solve for x
   x = 772,757,032,356/621,117
6. Step 6: Final answer
   x = 1,244,140.85