Finding the Third Proportional to 285,921 and 611,104.50

Step by Step Solution

1. Step 1: Write the proportion equation
   285,921 : 611,104.50 = 611,104.50 : x
2. Step 2: Convert to fraction form
   285,921/611,104.50 = 611,104.50/x
3. Step 3: Cross multiply
   285,921x = 611,104.50 × 611,104.50
4. Step 4: Simplify right side
   285,921x = 373,448,709,920.25
5. Step 5: Solve for x
   x = 373,448,709,920.25/285,921
6. Step 6: Final answer
   x = 1,306,125.50