Finding the Third Proportional to 55,216.69 and 87,574.61

Step by Step Solution

1. Step 1: Write the proportion equation
   55,216.69 : 87,574.61 = 87,574.61 : x
2. Step 2: Convert to fraction form
   55,216.69/87,574.61 = 87,574.61/x
3. Step 3: Cross multiply
   55,216.69x = 87,574.61 × 87,574.61
4. Step 4: Simplify right side
   55,216.69x = 7,669,311,523.01
5. Step 5: Solve for x
   x = 7,669,311,523.01/55,216.69
6. Step 6: Final answer
   x = 138,894.81