Finding the Third Proportional to 11,145 and 14,917.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,145 : 14,917.50 = 14,917.50 : x
2. Step 2: Convert to fraction form
   11,145/14,917.50 = 14,917.50/x
3. Step 3: Cross multiply
   11,145x = 14,917.50 × 14,917.50
4. Step 4: Simplify right side
   11,145x = 222,531,806.25
5. Step 5: Solve for x
   x = 222,531,806.25/11,145
6. Step 6: Final answer
   x = 19,966.96