Finding the Third Proportional to 55,911 and 83,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,911 : 83,920.50 = 83,920.50 : x
2. Step 2: Convert to fraction form
   55,911/83,920.50 = 83,920.50/x
3. Step 3: Cross multiply
   55,911x = 83,920.50 × 83,920.50
4. Step 4: Simplify right side
   55,911x = 7,042,650,320.25
5. Step 5: Solve for x
   x = 7,042,650,320.25/55,911
6. Step 6: Final answer
   x = 125,961.80