Finding the Third Proportional to 155,440.50 and 278,892

Step by Step Solution

1. Step 1: Write the proportion equation
   155,440.50 : 278,892 = 278,892 : x
2. Step 2: Convert to fraction form
   155,440.50/278,892 = 278,892/x
3. Step 3: Cross multiply
   155,440.50x = 278,892 × 278,892
4. Step 4: Simplify right side
   155,440.50x = 77,780,747,664
5. Step 5: Solve for x
   x = 77,780,747,664/155,440.50
6. Step 6: Final answer
   x = 500,389.20