Finding the Third Proportional to 31,580.50 and 69,104.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,580.50 : 69,104.50 = 69,104.50 : x
2. Step 2: Convert to fraction form
   31,580.50/69,104.50 = 69,104.50/x
3. Step 3: Cross multiply
   31,580.50x = 69,104.50 × 69,104.50
4. Step 4: Simplify right side
   31,580.50x = 4,775,431,920.25
5. Step 5: Solve for x
   x = 4,775,431,920.25/31,580.50
6. Step 6: Final answer
   x = 151,214.58