Finding the Third Proportional to 31,127.75 and 66,629.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,127.75 : 66,629.50 = 66,629.50 : x
2. Step 2: Convert to fraction form
   31,127.75/66,629.50 = 66,629.50/x
3. Step 3: Cross multiply
   31,127.75x = 66,629.50 × 66,629.50
4. Step 4: Simplify right side
   31,127.75x = 4,439,490,270.25
5. Step 5: Solve for x
   x = 4,439,490,270.25/31,127.75
6. Step 6: Final answer
   x = 142,621.62