Finding the Third Proportional to 9,911.25 and 13,590.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,911.25 : 13,590.56 = 13,590.56 : x
2. Step 2: Convert to fraction form
   9,911.25/13,590.56 = 13,590.56/x
3. Step 3: Cross multiply
   9,911.25x = 13,590.56 × 13,590.56
4. Step 4: Simplify right side
   9,911.25x = 184,703,389.07
5. Step 5: Solve for x
   x = 184,703,389.07/9,911.25
6. Step 6: Final answer
   x = 18,635.73