Finding the Third Proportional to 64,877 and 139,453

Step by Step Solution

1. Step 1: Write the proportion equation
   64,877 : 139,453 = 139,453 : x
2. Step 2: Convert to fraction form
   64,877/139,453 = 139,453/x
3. Step 3: Cross multiply
   64,877x = 139,453 × 139,453
4. Step 4: Simplify right side
   64,877x = 19,447,139,209
5. Step 5: Solve for x
   x = 19,447,139,209/64,877
6. Step 6: Final answer
   x = 299,753.98