Finding the Third Proportional to 90,103.50 and 129,791.25

Step by Step Solution

1. Step 1: Write the proportion equation
   90,103.50 : 129,791.25 = 129,791.25 : x
2. Step 2: Convert to fraction form
   90,103.50/129,791.25 = 129,791.25/x
3. Step 3: Cross multiply
   90,103.50x = 129,791.25 × 129,791.25
4. Step 4: Simplify right side
   90,103.50x = 16,845,768,576.56
5. Step 5: Solve for x
   x = 16,845,768,576.56/90,103.50
6. Step 6: Final answer
   x = 186,960.20