Finding the Third Proportional to 90,776 and 139,992

Step by Step Solution

1. Step 1: Write the proportion equation
   90,776 : 139,992 = 139,992 : x
2. Step 2: Convert to fraction form
   90,776/139,992 = 139,992/x
3. Step 3: Cross multiply
   90,776x = 139,992 × 139,992
4. Step 4: Simplify right side
   90,776x = 19,597,760,064
5. Step 5: Solve for x
   x = 19,597,760,064/90,776
6. Step 6: Final answer
   x = 215,891.43