Finding the Third Proportional to 721,078 and 1,131,107

Step by Step Solution

1. Step 1: Write the proportion equation
   721,078 : 1,131,107 = 1,131,107 : x
2. Step 2: Convert to fraction form
   721,078/1,131,107 = 1,131,107/x
3. Step 3: Cross multiply
   721,078x = 1,131,107 × 1,131,107
4. Step 4: Simplify right side
   721,078x = 1,279,403,045,449
5. Step 5: Solve for x
   x = 1,279,403,045,449/721,078
6. Step 6: Final answer
   x = 1,774,292.16