Finding the Third Proportional to 212,554.55 and 317,697.82

Step by Step Solution

1. Step 1: Write the proportion equation
   212,554.55 : 317,697.82 = 317,697.82 : x
2. Step 2: Convert to fraction form
   212,554.55/317,697.82 = 317,697.82/x
3. Step 3: Cross multiply
   212,554.55x = 317,697.82 × 317,697.82
4. Step 4: Simplify right side
   212,554.55x = 100,931,905,031.31
5. Step 5: Solve for x
   x = 100,931,905,031.31/212,554.55
6. Step 6: Final answer
   x = 474,851.78