Finding the Third Proportional to 180,155 and 391,078

Step by Step Solution

1. Step 1: Write the proportion equation
   180,155 : 391,078 = 391,078 : x
2. Step 2: Convert to fraction form
   180,155/391,078 = 391,078/x
3. Step 3: Cross multiply
   180,155x = 391,078 × 391,078
4. Step 4: Simplify right side
   180,155x = 152,942,002,084
5. Step 5: Solve for x
   x = 152,942,002,084/180,155
6. Step 6: Final answer
   x = 848,946.75