Finding the Third Proportional to 136,111.50 and 211,189.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,111.50 : 211,189.50 = 211,189.50 : x
2. Step 2: Convert to fraction form
   136,111.50/211,189.50 = 211,189.50/x
3. Step 3: Cross multiply
   136,111.50x = 211,189.50 × 211,189.50
4. Step 4: Simplify right side
   136,111.50x = 44,601,004,910.25
5. Step 5: Solve for x
   x = 44,601,004,910.25/136,111.50
6. Step 6: Final answer
   x = 327,679.92