Finding the Third Proportional to 259,386 and 558,784.50

Step by Step Solution

1. Step 1: Write the proportion equation
   259,386 : 558,784.50 = 558,784.50 : x
2. Step 2: Convert to fraction form
   259,386/558,784.50 = 558,784.50/x
3. Step 3: Cross multiply
   259,386x = 558,784.50 × 558,784.50
4. Step 4: Simplify right side
   259,386x = 312,240,117,440.25
5. Step 5: Solve for x
   x = 312,240,117,440.25/259,386
6. Step 6: Final answer
   x = 1,203,766.27