Finding the Third Proportional to 279,141 and 398,704.50

Step by Step Solution

1. Step 1: Write the proportion equation
   279,141 : 398,704.50 = 398,704.50 : x
2. Step 2: Convert to fraction form
   279,141/398,704.50 = 398,704.50/x
3. Step 3: Cross multiply
   279,141x = 398,704.50 × 398,704.50
4. Step 4: Simplify right side
   279,141x = 158,965,278,320.25
5. Step 5: Solve for x
   x = 158,965,278,320.25/279,141
6. Step 6: Final answer
   x = 569,480.22