Finding the Third Proportional to 54,449.72 and 87,719.20

Step by Step Solution

1. Step 1: Write the proportion equation
   54,449.72 : 87,719.20 = 87,719.20 : x
2. Step 2: Convert to fraction form
   54,449.72/87,719.20 = 87,719.20/x
3. Step 3: Cross multiply
   54,449.72x = 87,719.20 × 87,719.20
4. Step 4: Simplify right side
   54,449.72x = 7,694,658,596.89
5. Step 5: Solve for x
   x = 7,694,658,596.89/54,449.72
6. Step 6: Final answer
   x = 141,316.77