Finding the Third Proportional to 136,171.50 and 210,000

Step by Step Solution

1. Step 1: Write the proportion equation
   136,171.50 : 210,000 = 210,000 : x
2. Step 2: Convert to fraction form
   136,171.50/210,000 = 210,000/x
3. Step 3: Cross multiply
   136,171.50x = 210,000 × 210,000
4. Step 4: Simplify right side
   136,171.50x = 44,100,000,000
5. Step 5: Solve for x
   x = 44,100,000,000/136,171.50
6. Step 6: Final answer
   x = 323,856.31