Finding the Third Proportional to 136,147.50 and 211,680

Step by Step Solution

1. Step 1: Write the proportion equation
   136,147.50 : 211,680 = 211,680 : x
2. Step 2: Convert to fraction form
   136,147.50/211,680 = 211,680/x
3. Step 3: Cross multiply
   136,147.50x = 211,680 × 211,680
4. Step 4: Simplify right side
   136,147.50x = 44,808,422,400
5. Step 5: Solve for x
   x = 44,808,422,400/136,147.50
6. Step 6: Final answer
   x = 329,116.75