Finding the Third Proportional to 9,991.69 and 14,918.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991.69 : 14,918.91 = 14,918.91 : x
2. Step 2: Convert to fraction form
   9,991.69/14,918.91 = 14,918.91/x
3. Step 3: Cross multiply
   9,991.69x = 14,918.91 × 14,918.91
4. Step 4: Simplify right side
   9,991.69x = 222,573,763.70
5. Step 5: Solve for x
   x = 222,573,763.70/9,991.69
6. Step 6: Final answer
   x = 22,275.89