Finding the Third Proportional to 42,928.50 and 57,318

Step by Step Solution

1. Step 1: Write the proportion equation
   42,928.50 : 57,318 = 57,318 : x
2. Step 2: Convert to fraction form
   42,928.50/57,318 = 57,318/x
3. Step 3: Cross multiply
   42,928.50x = 57,318 × 57,318
4. Step 4: Simplify right side
   42,928.50x = 3,285,353,124
5. Step 5: Solve for x
   x = 3,285,353,124/42,928.50
6. Step 6: Final answer
   x = 76,530.82