Finding the Third Proportional to 31,687.88 and 69,572.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,687.88 : 69,572.25 = 69,572.25 : x
2. Step 2: Convert to fraction form
   31,687.88/69,572.25 = 69,572.25/x
3. Step 3: Cross multiply
   31,687.88x = 69,572.25 × 69,572.25
4. Step 4: Simplify right side
   31,687.88x = 4,840,297,970.06
5. Step 5: Solve for x
   x = 4,840,297,970.06/31,687.88
6. Step 6: Final answer
   x = 152,749.21