Finding the Third Proportional to 138,134 and 207,713.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,134 : 207,713.50 = 207,713.50 : x
2. Step 2: Convert to fraction form
   138,134/207,713.50 = 207,713.50/x
3. Step 3: Cross multiply
   138,134x = 207,713.50 × 207,713.50
4. Step 4: Simplify right side
   138,134x = 43,144,898,082.25
5. Step 5: Solve for x
   x = 43,144,898,082.25/138,134
6. Step 6: Final answer
   x = 312,340.90