Finding the Third Proportional to 64,945.55 and 139,561.73

Step by Step Solution

1. Step 1: Write the proportion equation
   64,945.55 : 139,561.73 = 139,561.73 : x
2. Step 2: Convert to fraction form
   64,945.55/139,561.73 = 139,561.73/x
3. Step 3: Cross multiply
   64,945.55x = 139,561.73 × 139,561.73
4. Step 4: Simplify right side
   64,945.55x = 19,477,477,701.76
5. Step 5: Solve for x
   x = 19,477,477,701.76/64,945.55
6. Step 6: Final answer
   x = 299,904.75