Finding the Third Proportional to 55,698.50 and 86,286.75

Step by Step Solution

1. Step 1: Write the proportion equation
   55,698.50 : 86,286.75 = 86,286.75 : x
2. Step 2: Convert to fraction form
   55,698.50/86,286.75 = 86,286.75/x
3. Step 3: Cross multiply
   55,698.50x = 86,286.75 × 86,286.75
4. Step 4: Simplify right side
   55,698.50x = 7,445,403,225.56
5. Step 5: Solve for x
   x = 7,445,403,225.56/55,698.50
6. Step 6: Final answer
   x = 133,673.32