Finding the Third Proportional to 66,731.25 and 141,940.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,731.25 : 141,940.50 = 141,940.50 : x
2. Step 2: Convert to fraction form
   66,731.25/141,940.50 = 141,940.50/x
3. Step 3: Cross multiply
   66,731.25x = 141,940.50 × 141,940.50
4. Step 4: Simplify right side
   66,731.25x = 20,147,105,540.25
5. Step 5: Solve for x
   x = 20,147,105,540.25/66,731.25
6. Step 6: Final answer
   x = 301,914.10