Finding the Third Proportional to 54,973.69 and 87,115.50

Step by Step Solution

1. Step 1: Write the proportion equation
   54,973.69 : 87,115.50 = 87,115.50 : x
2. Step 2: Convert to fraction form
   54,973.69/87,115.50 = 87,115.50/x
3. Step 3: Cross multiply
   54,973.69x = 87,115.50 × 87,115.50
4. Step 4: Simplify right side
   54,973.69x = 7,589,110,340.25
5. Step 5: Solve for x
   x = 7,589,110,340.25/54,973.69
6. Step 6: Final answer
   x = 138,049.87