Finding the Third Proportional to 224,978.50 and 316,418

Step by Step Solution

1. Step 1: Write the proportion equation
   224,978.50 : 316,418 = 316,418 : x
2. Step 2: Convert to fraction form
   224,978.50/316,418 = 316,418/x
3. Step 3: Cross multiply
   224,978.50x = 316,418 × 316,418
4. Step 4: Simplify right side
   224,978.50x = 100,120,350,724
5. Step 5: Solve for x
   x = 100,120,350,724/224,978.50
6. Step 6: Final answer
   x = 445,021.86