Finding the Third Proportional to 45,399 and 79,945.50

Step by Step Solution

1. Step 1: Write the proportion equation
   45,399 : 79,945.50 = 79,945.50 : x
2. Step 2: Convert to fraction form
   45,399/79,945.50 = 79,945.50/x
3. Step 3: Cross multiply
   45,399x = 79,945.50 × 79,945.50
4. Step 4: Simplify right side
   45,399x = 6,391,282,970.25
5. Step 5: Solve for x
   x = 6,391,282,970.25/45,399
6. Step 6: Final answer
   x = 140,780.26