Finding the Third Proportional to 31,891.50 and 69,831

Step by Step Solution

1. Step 1: Write the proportion equation
   31,891.50 : 69,831 = 69,831 : x
2. Step 2: Convert to fraction form
   31,891.50/69,831 = 69,831/x
3. Step 3: Cross multiply
   31,891.50x = 69,831 × 69,831
4. Step 4: Simplify right side
   31,891.50x = 4,876,368,561
5. Step 5: Solve for x
   x = 4,876,368,561/31,891.50
6. Step 6: Final answer
   x = 152,904.96