Finding the Third Proportional to 64,513.25 and 139,406.38

Step by Step Solution

1. Step 1: Write the proportion equation
   64,513.25 : 139,406.38 = 139,406.38 : x
2. Step 2: Convert to fraction form
   64,513.25/139,406.38 = 139,406.38/x
3. Step 3: Cross multiply
   64,513.25x = 139,406.38 × 139,406.38
4. Step 4: Simplify right side
   64,513.25x = 19,434,137,390.64
5. Step 5: Solve for x
   x = 19,434,137,390.64/64,513.25
6. Step 6: Final answer
   x = 301,242.57