Finding the Third Proportional to 64,156.50 and 139,959

Step by Step Solution

1. Step 1: Write the proportion equation
   64,156.50 : 139,959 = 139,959 : x
2. Step 2: Convert to fraction form
   64,156.50/139,959 = 139,959/x
3. Step 3: Cross multiply
   64,156.50x = 139,959 × 139,959
4. Step 4: Simplify right side
   64,156.50x = 19,588,521,681
5. Step 5: Solve for x
   x = 19,588,521,681/64,156.50
6. Step 6: Final answer
   x = 305,324.04