Finding the Third Proportional to 177,914.50 and 390,821

Step by Step Solution

1. Step 1: Write the proportion equation
   177,914.50 : 390,821 = 390,821 : x
2. Step 2: Convert to fraction form
   177,914.50/390,821 = 390,821/x
3. Step 3: Cross multiply
   177,914.50x = 390,821 × 390,821
4. Step 4: Simplify right side
   177,914.50x = 152,741,054,041
5. Step 5: Solve for x
   x = 152,741,054,041/177,914.50
6. Step 6: Final answer
   x = 858,508.18