Finding the Third Proportional to 109,172 and 140,430

Step by Step Solution

1. Step 1: Write the proportion equation
   109,172 : 140,430 = 140,430 : x
2. Step 2: Convert to fraction form
   109,172/140,430 = 140,430/x
3. Step 3: Cross multiply
   109,172x = 140,430 × 140,430
4. Step 4: Simplify right side
   109,172x = 19,720,584,900
5. Step 5: Solve for x
   x = 19,720,584,900/109,172
6. Step 6: Final answer
   x = 180,637.75