Finding the Third Proportional to 55,783.69 and 84,989.25

Step by Step Solution

1. Step 1: Write the proportion equation
   55,783.69 : 84,989.25 = 84,989.25 : x
2. Step 2: Convert to fraction form
   55,783.69/84,989.25 = 84,989.25/x
3. Step 3: Cross multiply
   55,783.69x = 84,989.25 × 84,989.25
4. Step 4: Simplify right side
   55,783.69x = 7,223,172,615.56
5. Step 5: Solve for x
   x = 7,223,172,615.56/55,783.69
6. Step 6: Final answer
   x = 129,485.39