Finding the Third Proportional to 56,917.69 and 87,940.69

Step by Step Solution

1. Step 1: Write the proportion equation
   56,917.69 : 87,940.69 = 87,940.69 : x
2. Step 2: Convert to fraction form
   56,917.69/87,940.69 = 87,940.69/x
3. Step 3: Cross multiply
   56,917.69x = 87,940.69 × 87,940.69
4. Step 4: Simplify right side
   56,917.69x = 7,733,564,517.97
5. Step 5: Solve for x
   x = 7,733,564,517.97/56,917.69
6. Step 6: Final answer
   x = 135,872.78