Finding the Third Proportional to 55,559 and 86,039.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,559 : 86,039.50 = 86,039.50 : x
2. Step 2: Convert to fraction form
   55,559/86,039.50 = 86,039.50/x
3. Step 3: Cross multiply
   55,559x = 86,039.50 × 86,039.50
4. Step 4: Simplify right side
   55,559x = 7,402,795,560.25
5. Step 5: Solve for x
   x = 7,402,795,560.25/55,559
6. Step 6: Final answer
   x = 133,242.06