Finding the Third Proportional to 642,888 and 1,400,066

Step by Step Solution

1. Step 1: Write the proportion equation
   642,888 : 1,400,066 = 1,400,066 : x
2. Step 2: Convert to fraction form
   642,888/1,400,066 = 1,400,066/x
3. Step 3: Cross multiply
   642,888x = 1,400,066 × 1,400,066
4. Step 4: Simplify right side
   642,888x = 1,960,184,804,356
5. Step 5: Solve for x
   x = 1,960,184,804,356/642,888
6. Step 6: Final answer
   x = 3,049,030.01