Finding the Third Proportional to 133,863 and 207,388.50

Step by Step Solution

1. Step 1: Write the proportion equation
   133,863 : 207,388.50 = 207,388.50 : x
2. Step 2: Convert to fraction form
   133,863/207,388.50 = 207,388.50/x
3. Step 3: Cross multiply
   133,863x = 207,388.50 × 207,388.50
4. Step 4: Simplify right side
   133,863x = 43,009,989,932.25
5. Step 5: Solve for x
   x = 43,009,989,932.25/133,863
6. Step 6: Final answer
   x = 321,298.57