Finding the Third Proportional to 31,073.63 and 69,163.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,073.63 : 69,163.88 = 69,163.88 : x
2. Step 2: Convert to fraction form
   31,073.63/69,163.88 = 69,163.88/x
3. Step 3: Cross multiply
   31,073.63x = 69,163.88 × 69,163.88
4. Step 4: Simplify right side
   31,073.63x = 4,783,641,605.02
5. Step 5: Solve for x
   x = 4,783,641,605.02/31,073.63
6. Step 6: Final answer
   x = 153,945.40