Finding the Third Proportional to 31,170.66 and 64,558.69

Step by Step Solution

1. Step 1: Write the proportion equation
   31,170.66 : 64,558.69 = 64,558.69 : x
2. Step 2: Convert to fraction form
   31,170.66/64,558.69 = 64,558.69/x
3. Step 3: Cross multiply
   31,170.66x = 64,558.69 × 64,558.69
4. Step 4: Simplify right side
   31,170.66x = 4,167,824,131.72
5. Step 5: Solve for x
   x = 4,167,824,131.72/31,170.66
6. Step 6: Final answer
   x = 133,709.86