Finding the Third Proportional to 87,190.50 and 123,408.75

Step by Step Solution

1. Step 1: Write the proportion equation
   87,190.50 : 123,408.75 = 123,408.75 : x
2. Step 2: Convert to fraction form
   87,190.50/123,408.75 = 123,408.75/x
3. Step 3: Cross multiply
   87,190.50x = 123,408.75 × 123,408.75
4. Step 4: Simplify right side
   87,190.50x = 15,229,719,576.56
5. Step 5: Solve for x
   x = 15,229,719,576.56/87,190.50
6. Step 6: Final answer
   x = 174,671.78