Finding the Third Proportional to 31,716.56 and 69,710.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,716.56 : 69,710.63 = 69,710.63 : x
2. Step 2: Convert to fraction form
   31,716.56/69,710.63 = 69,710.63/x
3. Step 3: Cross multiply
   31,716.56x = 69,710.63 × 69,710.63
4. Step 4: Simplify right side
   31,716.56x = 4,859,571,237.89
5. Step 5: Solve for x
   x = 4,859,571,237.89/31,716.56
6. Step 6: Final answer
   x = 153,218.72