Finding the Third Proportional to 31,579.50 and 68,470.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,579.50 : 68,470.75 = 68,470.75 : x
2. Step 2: Convert to fraction form
   31,579.50/68,470.75 = 68,470.75/x
3. Step 3: Cross multiply
   31,579.50x = 68,470.75 × 68,470.75
4. Step 4: Simplify right side
   31,579.50x = 4,688,243,605.56
5. Step 5: Solve for x
   x = 4,688,243,605.56/31,579.50
6. Step 6: Final answer
   x = 148,458.45