Finding the Third Proportional to 31,911.50 and 69,959

Step by Step Solution

1. Step 1: Write the proportion equation
   31,911.50 : 69,959 = 69,959 : x
2. Step 2: Convert to fraction form
   31,911.50/69,959 = 69,959/x
3. Step 3: Cross multiply
   31,911.50x = 69,959 × 69,959
4. Step 4: Simplify right side
   31,911.50x = 4,894,261,681
5. Step 5: Solve for x
   x = 4,894,261,681/31,911.50
6. Step 6: Final answer
   x = 153,369.84