Finding the Third Proportional to 31,801.50 and 69,858

Step by Step Solution

1. Step 1: Write the proportion equation
   31,801.50 : 69,858 = 69,858 : x
2. Step 2: Convert to fraction form
   31,801.50/69,858 = 69,858/x
3. Step 3: Cross multiply
   31,801.50x = 69,858 × 69,858
4. Step 4: Simplify right side
   31,801.50x = 4,880,140,164
5. Step 5: Solve for x
   x = 4,880,140,164/31,801.50
6. Step 6: Final answer
   x = 153,456.29