Finding the Third Proportional to 128,988 and 185,791.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,988 : 185,791.50 = 185,791.50 : x
2. Step 2: Convert to fraction form
   128,988/185,791.50 = 185,791.50/x
3. Step 3: Cross multiply
   128,988x = 185,791.50 × 185,791.50
4. Step 4: Simplify right side
   128,988x = 34,518,481,472.25
5. Step 5: Solve for x
   x = 34,518,481,472.25/128,988
6. Step 6: Final answer
   x = 267,610.02