Finding the Third Proportional to 92,391 and 139,419

Step by Step Solution

1. Step 1: Write the proportion equation
   92,391 : 139,419 = 139,419 : x
2. Step 2: Convert to fraction form
   92,391/139,419 = 139,419/x
3. Step 3: Cross multiply
   92,391x = 139,419 × 139,419
4. Step 4: Simplify right side
   92,391x = 19,437,657,561
5. Step 5: Solve for x
   x = 19,437,657,561/92,391
6. Step 6: Final answer
   x = 210,384.75