Finding the Third Proportional to 129,270 and 279,295.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,270 : 279,295.50 = 279,295.50 : x
2. Step 2: Convert to fraction form
   129,270/279,295.50 = 279,295.50/x
3. Step 3: Cross multiply
   129,270x = 279,295.50 × 279,295.50
4. Step 4: Simplify right side
   129,270x = 78,005,976,320.25
5. Step 5: Solve for x
   x = 78,005,976,320.25/129,270
6. Step 6: Final answer
   x = 603,434.49