Finding the Third Proportional to 40,880 and 56,290

Step by Step Solution

1. Step 1: Write the proportion equation
   40,880 : 56,290 = 56,290 : x
2. Step 2: Convert to fraction form
   40,880/56,290 = 56,290/x
3. Step 3: Cross multiply
   40,880x = 56,290 × 56,290
4. Step 4: Simplify right side
   40,880x = 3,168,564,100
5. Step 5: Solve for x
   x = 3,168,564,100/40,880
6. Step 6: Final answer
   x = 77,508.91