Finding the Third Proportional to 279,619.50 and 613,674

Step by Step Solution

1. Step 1: Write the proportion equation
   279,619.50 : 613,674 = 613,674 : x
2. Step 2: Convert to fraction form
   279,619.50/613,674 = 613,674/x
3. Step 3: Cross multiply
   279,619.50x = 613,674 × 613,674
4. Step 4: Simplify right side
   279,619.50x = 376,595,778,276
5. Step 5: Solve for x
   x = 376,595,778,276/279,619.50
6. Step 6: Final answer
   x = 1,346,815.15