Finding the Third Proportional to 120,289 and 168,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   120,289 : 168,171.50 = 168,171.50 : x
2. Step 2: Convert to fraction form
   120,289/168,171.50 = 168,171.50/x
3. Step 3: Cross multiply
   120,289x = 168,171.50 × 168,171.50
4. Step 4: Simplify right side
   120,289x = 28,281,653,412.25
5. Step 5: Solve for x
   x = 28,281,653,412.25/120,289
6. Step 6: Final answer
   x = 235,114.21