Finding the Third Proportional to 131,342.50 and 208,009.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,342.50 : 208,009.50 = 208,009.50 : x
2. Step 2: Convert to fraction form
   131,342.50/208,009.50 = 208,009.50/x
3. Step 3: Cross multiply
   131,342.50x = 208,009.50 × 208,009.50
4. Step 4: Simplify right side
   131,342.50x = 43,267,952,090.25
5. Step 5: Solve for x
   x = 43,267,952,090.25/131,342.50
6. Step 6: Final answer
   x = 329,428.42