Finding the Third Proportional to 178,860 and 391,344.75

Step by Step Solution

1. Step 1: Write the proportion equation
   178,860 : 391,344.75 = 391,344.75 : x
2. Step 2: Convert to fraction form
   178,860/391,344.75 = 391,344.75/x
3. Step 3: Cross multiply
   178,860x = 391,344.75 × 391,344.75
4. Step 4: Simplify right side
   178,860x = 153,150,713,352.56
5. Step 5: Solve for x
   x = 153,150,713,352.56/178,860
6. Step 6: Final answer
   x = 856,260.28