Finding the Third Proportional to 558,985.50 and 790,200

Step by Step Solution

1. Step 1: Write the proportion equation
   558,985.50 : 790,200 = 790,200 : x
2. Step 2: Convert to fraction form
   558,985.50/790,200 = 790,200/x
3. Step 3: Cross multiply
   558,985.50x = 790,200 × 790,200
4. Step 4: Simplify right side
   558,985.50x = 624,416,040,000
5. Step 5: Solve for x
   x = 624,416,040,000/558,985.50
6. Step 6: Final answer
   x = 1,117,052.30