Finding the Third Proportional to 223,978 and 487,316

Step by Step Solution

1. Step 1: Write the proportion equation
   223,978 : 487,316 = 487,316 : x
2. Step 2: Convert to fraction form
   223,978/487,316 = 487,316/x
3. Step 3: Cross multiply
   223,978x = 487,316 × 487,316
4. Step 4: Simplify right side
   223,978x = 237,476,883,856
5. Step 5: Solve for x
   x = 237,476,883,856/223,978
6. Step 6: Final answer
   x = 1,060,268.79