Finding the Third Proportional to 112,978 and 248,528

Step by Step Solution

1. Step 1: Write the proportion equation
   112,978 : 248,528 = 248,528 : x
2. Step 2: Convert to fraction form
   112,978/248,528 = 248,528/x
3. Step 3: Cross multiply
   112,978x = 248,528 × 248,528
4. Step 4: Simplify right side
   112,978x = 61,766,166,784
5. Step 5: Solve for x
   x = 61,766,166,784/112,978
6. Step 6: Final answer
   x = 546,709.68