Finding the Third Proportional to 99,257.91 and 214,915.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,257.91 : 214,915.78 = 214,915.78 : x
2. Step 2: Convert to fraction form
   99,257.91/214,915.78 = 214,915.78/x
3. Step 3: Cross multiply
   99,257.91x = 214,915.78 × 214,915.78
4. Step 4: Simplify right side
   99,257.91x = 46,188,793,030.30
5. Step 5: Solve for x
   x = 46,188,793,030.30/99,257.91
6. Step 6: Final answer
   x = 465,341.20