Finding the Third Proportional to 253,154 and 392,494

Step by Step Solution

1. Step 1: Write the proportion equation
   253,154 : 392,494 = 392,494 : x
2. Step 2: Convert to fraction form
   253,154/392,494 = 392,494/x
3. Step 3: Cross multiply
   253,154x = 392,494 × 392,494
4. Step 4: Simplify right side
   253,154x = 154,051,540,036
5. Step 5: Solve for x
   x = 154,051,540,036/253,154
6. Step 6: Final answer
   x = 608,528.96