Finding the Third Proportional to 91,131.75 and 122,681.25

Step by Step Solution

1. Step 1: Write the proportion equation
   91,131.75 : 122,681.25 = 122,681.25 : x
2. Step 2: Convert to fraction form
   91,131.75/122,681.25 = 122,681.25/x
3. Step 3: Cross multiply
   91,131.75x = 122,681.25 × 122,681.25
4. Step 4: Simplify right side
   91,131.75x = 15,050,689,101.56
5. Step 5: Solve for x
   x = 15,050,689,101.56/91,131.75
6. Step 6: Final answer
   x = 165,153.08