Finding the Third Proportional to 31,698.84 and 66,475.69

Step by Step Solution

1. Step 1: Write the proportion equation
   31,698.84 : 66,475.69 = 66,475.69 : x
2. Step 2: Convert to fraction form
   31,698.84/66,475.69 = 66,475.69/x
3. Step 3: Cross multiply
   31,698.84x = 66,475.69 × 66,475.69
4. Step 4: Simplify right side
   31,698.84x = 4,419,017,028.60
5. Step 5: Solve for x
   x = 4,419,017,028.60/31,698.84
6. Step 6: Final answer
   x = 139,406.25