Finding the Third Proportional to 863,140 and 1,320,988

Step by Step Solution

1. Step 1: Write the proportion equation
   863,140 : 1,320,988 = 1,320,988 : x
2. Step 2: Convert to fraction form
   863,140/1,320,988 = 1,320,988/x
3. Step 3: Cross multiply
   863,140x = 1,320,988 × 1,320,988
4. Step 4: Simplify right side
   863,140x = 1,745,009,296,144
5. Step 5: Solve for x
   x = 1,745,009,296,144/863,140
6. Step 6: Final answer
   x = 2,021,699.02