Finding the Third Proportional to 218,458.69 and 295,150.50

Step by Step Solution

1. Step 1: Write the proportion equation
   218,458.69 : 295,150.50 = 295,150.50 : x
2. Step 2: Convert to fraction form
   218,458.69/295,150.50 = 295,150.50/x
3. Step 3: Cross multiply
   218,458.69x = 295,150.50 × 295,150.50
4. Step 4: Simplify right side
   218,458.69x = 87,113,817,650.25
5. Step 5: Solve for x
   x = 87,113,817,650.25/218,458.69
6. Step 6: Final answer
   x = 398,765.64