Finding the Third Proportional to 64,315.50 and 139,323

Step by Step Solution

1. Step 1: Write the proportion equation
   64,315.50 : 139,323 = 139,323 : x
2. Step 2: Convert to fraction form
   64,315.50/139,323 = 139,323/x
3. Step 3: Cross multiply
   64,315.50x = 139,323 × 139,323
4. Step 4: Simplify right side
   64,315.50x = 19,410,898,329
5. Step 5: Solve for x
   x = 19,410,898,329/64,315.50
6. Step 6: Final answer
   x = 301,807.47