Finding the Third Proportional to 57,813.75 and 86,722.31

Step by Step Solution

1. Step 1: Write the proportion equation
   57,813.75 : 86,722.31 = 86,722.31 : x
2. Step 2: Convert to fraction form
   57,813.75/86,722.31 = 86,722.31/x
3. Step 3: Cross multiply
   57,813.75x = 86,722.31 × 86,722.31
4. Step 4: Simplify right side
   57,813.75x = 7,520,759,485.35
5. Step 5: Solve for x
   x = 7,520,759,485.35/57,813.75
6. Step 6: Final answer
   x = 130,086.00