Finding the Third Proportional to 146,718 and 215,905.50

Step by Step Solution

1. Step 1: Write the proportion equation
   146,718 : 215,905.50 = 215,905.50 : x
2. Step 2: Convert to fraction form
   146,718/215,905.50 = 215,905.50/x
3. Step 3: Cross multiply
   146,718x = 215,905.50 × 215,905.50
4. Step 4: Simplify right side
   146,718x = 46,615,184,930.25
5. Step 5: Solve for x
   x = 46,615,184,930.25/146,718
6. Step 6: Final answer
   x = 317,719.60