Finding the Third Proportional to 139,983 and 215,454

Step by Step Solution

1. Step 1: Write the proportion equation
   139,983 : 215,454 = 215,454 : x
2. Step 2: Convert to fraction form
   139,983/215,454 = 215,454/x
3. Step 3: Cross multiply
   139,983x = 215,454 × 215,454
4. Step 4: Simplify right side
   139,983x = 46,420,426,116
5. Step 5: Solve for x
   x = 46,420,426,116/139,983
6. Step 6: Final answer
   x = 331,614.74