Finding the Third Proportional to 139,023 and 211,200.75

Step by Step Solution

1. Step 1: Write the proportion equation
   139,023 : 211,200.75 = 211,200.75 : x
2. Step 2: Convert to fraction form
   139,023/211,200.75 = 211,200.75/x
3. Step 3: Cross multiply
   139,023x = 211,200.75 × 211,200.75
4. Step 4: Simplify right side
   139,023x = 44,605,756,800.56
5. Step 5: Solve for x
   x = 44,605,756,800.56/139,023
6. Step 6: Final answer
   x = 320,851.63