Finding the Third Proportional to 189,857.50 and 404,255

Step by Step Solution

1. Step 1: Write the proportion equation
   189,857.50 : 404,255 = 404,255 : x
2. Step 2: Convert to fraction form
   189,857.50/404,255 = 404,255/x
3. Step 3: Cross multiply
   189,857.50x = 404,255 × 404,255
4. Step 4: Simplify right side
   189,857.50x = 163,422,105,025
5. Step 5: Solve for x
   x = 163,422,105,025/189,857.50
6. Step 6: Final answer
   x = 860,761.91