Finding the Third Proportional to 142,955 and 209,656.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,955 : 209,656.50 = 209,656.50 : x
2. Step 2: Convert to fraction form
   142,955/209,656.50 = 209,656.50/x
3. Step 3: Cross multiply
   142,955x = 209,656.50 × 209,656.50
4. Step 4: Simplify right side
   142,955x = 43,955,847,992.25
5. Step 5: Solve for x
   x = 43,955,847,992.25/142,955
6. Step 6: Final answer
   x = 307,480.31