Finding the Third Proportional to 57,699 and 136,957.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,699 : 136,957.50 = 136,957.50 : x
2. Step 2: Convert to fraction form
   57,699/136,957.50 = 136,957.50/x
3. Step 3: Cross multiply
   57,699x = 136,957.50 × 136,957.50
4. Step 4: Simplify right side
   57,699x = 18,757,356,806.25
5. Step 5: Solve for x
   x = 18,757,356,806.25/57,699
6. Step 6: Final answer
   x = 325,089.81