Finding the Third Proportional to 757,188 and 1,129,221

Step by Step Solution

1. Step 1: Write the proportion equation
   757,188 : 1,129,221 = 1,129,221 : x
2. Step 2: Convert to fraction form
   757,188/1,129,221 = 1,129,221/x
3. Step 3: Cross multiply
   757,188x = 1,129,221 × 1,129,221
4. Step 4: Simplify right side
   757,188x = 1,275,140,066,841
5. Step 5: Solve for x
   x = 1,275,140,066,841/757,188
6. Step 6: Final answer
   x = 1,684,046.85