Finding the Third Proportional to 18,991.50 and 40,900.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,991.50 : 40,900.50 = 40,900.50 : x
2. Step 2: Convert to fraction form
   18,991.50/40,900.50 = 40,900.50/x
3. Step 3: Cross multiply
   18,991.50x = 40,900.50 × 40,900.50
4. Step 4: Simplify right side
   18,991.50x = 1,672,850,900.25
5. Step 5: Solve for x
   x = 1,672,850,900.25/18,991.50
6. Step 6: Final answer
   x = 88,084.19