Finding the Third Proportional to 31,468.50 and 69,930

Step by Step Solution

1. Step 1: Write the proportion equation
   31,468.50 : 69,930 = 69,930 : x
2. Step 2: Convert to fraction form
   31,468.50/69,930 = 69,930/x
3. Step 3: Cross multiply
   31,468.50x = 69,930 × 69,930
4. Step 4: Simplify right side
   31,468.50x = 4,890,204,900
5. Step 5: Solve for x
   x = 4,890,204,900/31,468.50
6. Step 6: Final answer
   x = 155,400