Finding the Third Proportional to 558,978.75 and 790,191

Step by Step Solution

1. Step 1: Write the proportion equation
   558,978.75 : 790,191 = 790,191 : x
2. Step 2: Convert to fraction form
   558,978.75/790,191 = 790,191/x
3. Step 3: Cross multiply
   558,978.75x = 790,191 × 790,191
4. Step 4: Simplify right side
   558,978.75x = 624,401,816,481
5. Step 5: Solve for x
   x = 624,401,816,481/558,978.75
6. Step 6: Final answer
   x = 1,117,040.35