Finding the Third Proportional to 55,422 and 81,189.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,422 : 81,189.50 = 81,189.50 : x
2. Step 2: Convert to fraction form
   55,422/81,189.50 = 81,189.50/x
3. Step 3: Cross multiply
   55,422x = 81,189.50 × 81,189.50
4. Step 4: Simplify right side
   55,422x = 6,591,734,910.25
5. Step 5: Solve for x
   x = 6,591,734,910.25/55,422
6. Step 6: Final answer
   x = 118,937.15