Finding the Third Proportional to 112,978 and 243,468

Step by Step Solution

1. Step 1: Write the proportion equation
   112,978 : 243,468 = 243,468 : x
2. Step 2: Convert to fraction form
   112,978/243,468 = 243,468/x
3. Step 3: Cross multiply
   112,978x = 243,468 × 243,468
4. Step 4: Simplify right side
   112,978x = 59,276,667,024
5. Step 5: Solve for x
   x = 59,276,667,024/112,978
6. Step 6: Final answer
   x = 524,674.42