Finding the Third Proportional to 558,918 and 790,100.50

Step by Step Solution

1. Step 1: Write the proportion equation
   558,918 : 790,100.50 = 790,100.50 : x
2. Step 2: Convert to fraction form
   558,918/790,100.50 = 790,100.50/x
3. Step 3: Cross multiply
   558,918x = 790,100.50 × 790,100.50
4. Step 4: Simplify right side
   558,918x = 624,258,800,100.25
5. Step 5: Solve for x
   x = 624,258,800,100.25/558,918
6. Step 6: Final answer
   x = 1,116,905.88