Finding the Third Proportional to 199,990.50 and 281,274

Step by Step Solution

1. Step 1: Write the proportion equation
   199,990.50 : 281,274 = 281,274 : x
2. Step 2: Convert to fraction form
   199,990.50/281,274 = 281,274/x
3. Step 3: Cross multiply
   199,990.50x = 281,274 × 281,274
4. Step 4: Simplify right side
   199,990.50x = 79,115,063,076
5. Step 5: Solve for x
   x = 79,115,063,076/199,990.50
6. Step 6: Final answer
   x = 395,594.11