Finding the Third Proportional to 64,845.56 and 139,694.63

Step by Step Solution

1. Step 1: Write the proportion equation
   64,845.56 : 139,694.63 = 139,694.63 : x
2. Step 2: Convert to fraction form
   64,845.56/139,694.63 = 139,694.63/x
3. Step 3: Cross multiply
   64,845.56x = 139,694.63 × 139,694.63
4. Step 4: Simplify right side
   64,845.56x = 19,514,588,253.89
5. Step 5: Solve for x
   x = 19,514,588,253.89/64,845.56
6. Step 6: Final answer
   x = 300,939.46