Finding the Third Proportional to 64,942.88 and 139,590.56

Step by Step Solution

1. Step 1: Write the proportion equation
   64,942.88 : 139,590.56 = 139,590.56 : x
2. Step 2: Convert to fraction form
   64,942.88/139,590.56 = 139,590.56/x
3. Step 3: Cross multiply
   64,942.88x = 139,590.56 × 139,590.56
4. Step 4: Simplify right side
   64,942.88x = 19,485,525,139.07
5. Step 5: Solve for x
   x = 19,485,525,139.07/64,942.88
6. Step 6: Final answer
   x = 300,041.00