Finding the Third Proportional to 9,159.75 and 10,139.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,159.75 : 10,139.25 = 10,139.25 : x
2. Step 2: Convert to fraction form
   9,159.75/10,139.25 = 10,139.25/x
3. Step 3: Cross multiply
   9,159.75x = 10,139.25 × 10,139.25
4. Step 4: Simplify right side
   9,159.75x = 102,804,390.56
5. Step 5: Solve for x
   x = 102,804,390.56/9,159.75
6. Step 6: Final answer
   x = 11,223.49