Finding the Third Proportional to 28,311.40 and 39,679.24

Step by Step Solution

1. Step 1: Write the proportion equation
   28,311.40 : 39,679.24 = 39,679.24 : x
2. Step 2: Convert to fraction form
   28,311.40/39,679.24 = 39,679.24/x
3. Step 3: Cross multiply
   28,311.40x = 39,679.24 × 39,679.24
4. Step 4: Simplify right side
   28,311.40x = 1,574,442,260.57
5. Step 5: Solve for x
   x = 1,574,442,260.57/28,311.40
6. Step 6: Final answer
   x = 55,611.60