Finding the Third Proportional to 135,126 and 210,169.50

Step by Step Solution

1. Step 1: Write the proportion equation
   135,126 : 210,169.50 = 210,169.50 : x
2. Step 2: Convert to fraction form
   135,126/210,169.50 = 210,169.50/x
3. Step 3: Cross multiply
   135,126x = 210,169.50 × 210,169.50
4. Step 4: Simplify right side
   135,126x = 44,171,218,730.25
5. Step 5: Solve for x
   x = 44,171,218,730.25/135,126
6. Step 6: Final answer
   x = 326,889.12