Finding the Third Proportional to 202,986 and 434,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   202,986 : 434,128.50 = 434,128.50 : x
2. Step 2: Convert to fraction form
   202,986/434,128.50 = 434,128.50/x
3. Step 3: Cross multiply
   202,986x = 434,128.50 × 434,128.50
4. Step 4: Simplify right side
   202,986x = 188,467,554,512.25
5. Step 5: Solve for x
   x = 188,467,554,512.25/202,986
6. Step 6: Final answer
   x = 928,475.63