Finding the Third Proportional to 212,087.25 and 311,002.88

Step by Step Solution

1. Step 1: Write the proportion equation
   212,087.25 : 311,002.88 = 311,002.88 : x
2. Step 2: Convert to fraction form
   212,087.25/311,002.88 = 311,002.88/x
3. Step 3: Cross multiply
   212,087.25x = 311,002.88 × 311,002.88
4. Step 4: Simplify right side
   212,087.25x = 96,722,788,258.27
5. Step 5: Solve for x
   x = 96,722,788,258.27/212,087.25
6. Step 6: Final answer
   x = 456,051.88