Finding the Third Proportional to 88,915.50 and 209,893.50

Step by Step Solution

1. Step 1: Write the proportion equation
   88,915.50 : 209,893.50 = 209,893.50 : x
2. Step 2: Convert to fraction form
   88,915.50/209,893.50 = 209,893.50/x
3. Step 3: Cross multiply
   88,915.50x = 209,893.50 × 209,893.50
4. Step 4: Simplify right side
   88,915.50x = 44,055,281,342.25
5. Step 5: Solve for x
   x = 44,055,281,342.25/88,915.50
6. Step 6: Final answer
   x = 495,473.58