Finding the Third Proportional to 55,389 and 83,591.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,389 : 83,591.50 = 83,591.50 : x
2. Step 2: Convert to fraction form
   55,389/83,591.50 = 83,591.50/x
3. Step 3: Cross multiply
   55,389x = 83,591.50 × 83,591.50
4. Step 4: Simplify right side
   55,389x = 6,987,538,872.25
5. Step 5: Solve for x
   x = 6,987,538,872.25/55,389
6. Step 6: Final answer
   x = 126,153.91