Finding the Third Proportional to 85,081.50 and 128,583

Step by Step Solution

1. Step 1: Write the proportion equation
   85,081.50 : 128,583 = 128,583 : x
2. Step 2: Convert to fraction form
   85,081.50/128,583 = 128,583/x
3. Step 3: Cross multiply
   85,081.50x = 128,583 × 128,583
4. Step 4: Simplify right side
   85,081.50x = 16,533,587,889
5. Step 5: Solve for x
   x = 16,533,587,889/85,081.50
6. Step 6: Final answer
   x = 194,326.47