Finding the Third Proportional to 30,915 and 41,992.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,915 : 41,992.50 = 41,992.50 : x
2. Step 2: Convert to fraction form
   30,915/41,992.50 = 41,992.50/x
3. Step 3: Cross multiply
   30,915x = 41,992.50 × 41,992.50
4. Step 4: Simplify right side
   30,915x = 1,763,370,056.25
5. Step 5: Solve for x
   x = 1,763,370,056.25/30,915
6. Step 6: Final answer
   x = 57,039.30