Finding the Third Proportional to 31,560 and 67,888.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,560 : 67,888.50 = 67,888.50 : x
2. Step 2: Convert to fraction form
   31,560/67,888.50 = 67,888.50/x
3. Step 3: Cross multiply
   31,560x = 67,888.50 × 67,888.50
4. Step 4: Simplify right side
   31,560x = 4,608,848,432.25
5. Step 5: Solve for x
   x = 4,608,848,432.25/31,560
6. Step 6: Final answer
   x = 146,034.49