Finding the Third Proportional to 263,388 and 558,123

Step by Step Solution

1. Step 1: Write the proportion equation
   263,388 : 558,123 = 558,123 : x
2. Step 2: Convert to fraction form
   263,388/558,123 = 558,123/x
3. Step 3: Cross multiply
   263,388x = 558,123 × 558,123
4. Step 4: Simplify right side
   263,388x = 311,501,283,129
5. Step 5: Solve for x
   x = 311,501,283,129/263,388
6. Step 6: Final answer
   x = 1,182,670.75