Finding the Third Proportional to 90,172 and 140,174

Step by Step Solution

1. Step 1: Write the proportion equation
   90,172 : 140,174 = 140,174 : x
2. Step 2: Convert to fraction form
   90,172/140,174 = 140,174/x
3. Step 3: Cross multiply
   90,172x = 140,174 × 140,174
4. Step 4: Simplify right side
   90,172x = 19,648,750,276
5. Step 5: Solve for x
   x = 19,648,750,276/90,172
6. Step 6: Final answer
   x = 217,903.01