Finding the Third Proportional to 90,605 and 130,507.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,605 : 130,507.50 = 130,507.50 : x
2. Step 2: Convert to fraction form
   90,605/130,507.50 = 130,507.50/x
3. Step 3: Cross multiply
   90,605x = 130,507.50 × 130,507.50
4. Step 4: Simplify right side
   90,605x = 17,032,207,556.25
5. Step 5: Solve for x
   x = 17,032,207,556.25/90,605
6. Step 6: Final answer
   x = 187,983.09