Finding the Third Proportional to 69,220.50 and 90,892.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,220.50 : 90,892.50 = 90,892.50 : x
2. Step 2: Convert to fraction form
   69,220.50/90,892.50 = 90,892.50/x
3. Step 3: Cross multiply
   69,220.50x = 90,892.50 × 90,892.50
4. Step 4: Simplify right side
   69,220.50x = 8,261,446,556.25
5. Step 5: Solve for x
   x = 8,261,446,556.25/69,220.50
6. Step 6: Final answer
   x = 119,349.71