Finding the Third Proportional to 55,815 and 83,902.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,815 : 83,902.50 = 83,902.50 : x
2. Step 2: Convert to fraction form
   55,815/83,902.50 = 83,902.50/x
3. Step 3: Cross multiply
   55,815x = 83,902.50 × 83,902.50
4. Step 4: Simplify right side
   55,815x = 7,039,629,506.25
5. Step 5: Solve for x
   x = 7,039,629,506.25/55,815
6. Step 6: Final answer
   x = 126,124.33