Finding the Third Proportional to 286,375.50 and 617,017.50

Step by Step Solution

1. Step 1: Write the proportion equation
   286,375.50 : 617,017.50 = 617,017.50 : x
2. Step 2: Convert to fraction form
   286,375.50/617,017.50 = 617,017.50/x
3. Step 3: Cross multiply
   286,375.50x = 617,017.50 × 617,017.50
4. Step 4: Simplify right side
   286,375.50x = 380,710,595,306.25
5. Step 5: Solve for x
   x = 380,710,595,306.25/286,375.50
6. Step 6: Final answer
   x = 1,329,410.50