Finding the Third Proportional to 57,891.38 and 86,594.06

Step by Step Solution

1. Step 1: Write the proportion equation
   57,891.38 : 86,594.06 = 86,594.06 : x
2. Step 2: Convert to fraction form
   57,891.38/86,594.06 = 86,594.06/x
3. Step 3: Cross multiply
   57,891.38x = 86,594.06 × 86,594.06
4. Step 4: Simplify right side
   57,891.38x = 7,498,531,660.25
5. Step 5: Solve for x
   x = 7,498,531,660.25/57,891.38
6. Step 6: Final answer
   x = 129,527.61