Finding the Third Proportional to 135,240 and 210,229.50

Step by Step Solution

1. Step 1: Write the proportion equation
   135,240 : 210,229.50 = 210,229.50 : x
2. Step 2: Convert to fraction form
   135,240/210,229.50 = 210,229.50/x
3. Step 3: Cross multiply
   135,240x = 210,229.50 × 210,229.50
4. Step 4: Simplify right side
   135,240x = 44,196,442,670.25
5. Step 5: Solve for x
   x = 44,196,442,670.25/135,240
6. Step 6: Final answer
   x = 326,800.08