Finding the Third Proportional to 54,915.75 and 80,287.88

Step by Step Solution

1. Step 1: Write the proportion equation
   54,915.75 : 80,287.88 = 80,287.88 : x
2. Step 2: Convert to fraction form
   54,915.75/80,287.88 = 80,287.88/x
3. Step 3: Cross multiply
   54,915.75x = 80,287.88 × 80,287.88
4. Step 4: Simplify right side
   54,915.75x = 6,446,142,872.02
5. Step 5: Solve for x
   x = 6,446,142,872.02/54,915.75
6. Step 6: Final answer
   x = 117,382.41