Finding the Third Proportional to 140,942.25 and 215,878.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,942.25 : 215,878.50 = 215,878.50 : x
2. Step 2: Convert to fraction form
   140,942.25/215,878.50 = 215,878.50/x
3. Step 3: Cross multiply
   140,942.25x = 215,878.50 × 215,878.50
4. Step 4: Simplify right side
   140,942.25x = 46,603,526,762.25
5. Step 5: Solve for x
   x = 46,603,526,762.25/140,942.25
6. Step 6: Final answer
   x = 330,656.90