Finding the Third Proportional to 68,827.50 and 90,706.50

Step by Step Solution

1. Step 1: Write the proportion equation
   68,827.50 : 90,706.50 = 90,706.50 : x
2. Step 2: Convert to fraction form
   68,827.50/90,706.50 = 90,706.50/x
3. Step 3: Cross multiply
   68,827.50x = 90,706.50 × 90,706.50
4. Step 4: Simplify right side
   68,827.50x = 8,227,669,142.25
5. Step 5: Solve for x
   x = 8,227,669,142.25/68,827.50
6. Step 6: Final answer
   x = 119,540.43