Finding the Third Proportional to 90,256 and 143,040

Step by Step Solution

1. Step 1: Write the proportion equation
   90,256 : 143,040 = 143,040 : x
2. Step 2: Convert to fraction form
   90,256/143,040 = 143,040/x
3. Step 3: Cross multiply
   90,256x = 143,040 × 143,040
4. Step 4: Simplify right side
   90,256x = 20,460,441,600
5. Step 5: Solve for x
   x = 20,460,441,600/90,256
6. Step 6: Final answer
   x = 226,693.42