Finding the Third Proportional to 137,144 and 207,174

Step by Step Solution

1. Step 1: Write the proportion equation
   137,144 : 207,174 = 207,174 : x
2. Step 2: Convert to fraction form
   137,144/207,174 = 207,174/x
3. Step 3: Cross multiply
   137,144x = 207,174 × 207,174
4. Step 4: Simplify right side
   137,144x = 42,921,066,276
5. Step 5: Solve for x
   x = 42,921,066,276/137,144
6. Step 6: Final answer
   x = 312,963.50